Package 'kableExtra'

Title: Construct Complex Table with 'kable' and Pipe Syntax
Description: Build complex HTML or 'LaTeX' tables using 'kable()' from 'knitr' and the piping syntax from 'magrittr'. Function 'kable()' is a light weight table generator coming from 'knitr'. This package simplifies the way to manipulate the HTML or 'LaTeX' codes generated by 'kable()' and allows users to construct complex tables and customize styles using a readable syntax.
Authors: Hao Zhu [aut, cre] , Thomas Travison [ctb], Timothy Tsai [ctb], Will Beasley [ctb], Yihui Xie [ctb], GuangChuang Yu [ctb], Stéphane Laurent [ctb], Rob Shepherd [ctb], Yoni Sidi [ctb], Brian Salzer [ctb], George Gui [ctb], Yeliang Fan [ctb], Duncan Murdoch [ctb], Bill Evans [ctb]
Maintainer: Hao Zhu <[email protected]>
License: MIT + file LICENSE
Version: 1.3.4.9000
Built: 2024-09-02 06:11:01 UTC
Source: https://github.com/ThierryO/kableExtra

Help Index

kableExtra

Description

When we are talking about table generators in R, knitr's kable() function wins lots of flavor by its ultimate simplicity. Unlike those powerful table rendering engines such as xtable, the philosophy behind knitr::kable() is to make it easy for programmers to use. Just as it claimed in its function description, "this is a very simple table generator. It is simple by design. It is not intended to replace any other R packages for making tables. - Yihui".

However, the ultimate simplicity of kable() also brought troubles to some of us, especially for new R users, who may not have a lot of experience on generating tables in R. It is not rare to see people including experienced users asking questions like how to center/left-align a table on Stack Overflow. Also, for me personally, I found myself repeatedly parsing CSS into kable() for some very simple features like striped lines. For LaTeX, it's even worse since I'm almost Stack Overflow dependent for LaTeX... That's why this package kableExtra was created.

I hope with kableExtra, you can

  • Use default base kable() (Or a good alternative for markdown tables is pander::pander()) for all simple tables

  • Use kable() with kableExtra to generate 90 % of complex/advanced tables in either HTML or LaTeX

  • Only have to mess with raw HTML/LaTeX in the last 10% cases where kableExtra cannot solve the problem

For a full package documentation, please visit the package documentation site for more information

Features

Pipable syntax: kableExtra is NOT a table generating package. It is a package that can "add features" to a kable output using a syntax that every useR loves - the pipe. We see similar approaches to deal with plots in packages like ggvis and plotly. There is no reason why we cannot use it with tables.

Unified functions for both HTML and PDF: Most functionalities in kableExtra can work in both HTML and PDF. In fact, as long as you specifies format in kable (which can be set globally through option knitr.table.format), functions in this package will pick the right way to manipulate the table be themselves. As a result, if users want to left align the table, kable_styling(kable(...), position = "left") will work in both HTML and PDF.

Note

If you found a feature on the documentation site that is not available in the version of kableExtra you are using, try to install the pre-release version from github. You can do so by running devtools::install_github("haozhu233/kableExtra").

Also, note that This package can load required LaTeX package automatically in vanilla rmarkdown. For customized rmarkdown templates, it is recommended to load related LaTeX packages manually.

Add footnote

Description

Add footnote to your favorite kable output.

Usage

add_footnote(
  input,
  label = NULL,
  notation = "alphabet",
  threeparttable = FALSE,
  escape = TRUE
)

Arguments

input

The direct output of your kable function or your last kableExtra function.
label

A vector of footnotes you want to add. You don't need to add notations in your notes.
notation

You can select the format of your footnote notation from number, alphabet, symbol and none.
threeparttable

Boolean value indicating if a threeparttable scheme should be used.
escape

Logical value controlling if the label needs to be escaped. Default is TRUE.

Examples

## Not run: 
x <- knitr::kable(head(mtcars), "html")
add_footnote(x, c("footnote 1", "footnote 2"), notation = "symbol")

## End(Not run)

Add a header row on top of current header

Description

Tables with multiple rows of header rows are extremely useful to demonstrate grouped data. This function takes the output of a kable() function and adds an header row on top of it.

Usage

add_header_above(
  kable_input,
  header = NULL,
  bold = FALSE,
  italic = FALSE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  align = "c",
  color = NULL,
  background = NULL,
  font_size = NULL,
  angle = NULL,
  escape = TRUE,
  line = TRUE,
  line_sep = 3,
  extra_css = NULL,
  include_empty = FALSE,
  border_left = FALSE,
  border_right = FALSE
)

Arguments

kable_input

Output of knitr::kable() with format specified
header

A (named) character vector with colspan as values. For example, c(" " = 1, "title" = 2) can be used to create a new header row for a 3-column table with "title" spanning across column 2 and 3. For convenience, when colspan equals to 1, users can drop the ⁠ = 1⁠ part. As a result, c(" ", "title" = 2) is the same as c(" " = 1, "title" = 2). Alternatively, a data frame with two columns can be provided: The first column should contain the header names (character vector) and the second column should contain the colspan (numeric vector). This input can be used if there are problems with unicode characters in the headers.
bold

A T/F value to control whether the text should be bolded.
italic

A T/F value to control whether the text should to be emphasized.
monospace

A T/F value to control whether the text of the selected column need to be monospaced (verbatim)
underline

A T/F value to control whether the text of the selected row need to be underlined
strikeout

A T/F value to control whether the text of the selected row need to be stricked out.
align

A character string for cell alignment. For HTML, possible values could be l, c, r plus left, center, right, justify, initial and inherit while for LaTeX, you can only choose from l, c & r.
color

A character string/vector for text color. Here please pay attention to the differences in color codes between HTML and LaTeX.
background

A character string/vector for background color. Here please pay attention to the differences in color codes between HTML and LaTeX. Also note that in HTML, background defined in cell_spec won't cover the whole cell.
font_size

A numeric input/vector for font size. For HTML, you can also use options including xx-small, x-small, small, medium, large, x-large, xx-large, smaller, larger, initial and inherit.
angle

0-360, degree that the text will rotate.
escape

A T/F value showing whether special characters should be escaped.
line

A T/F value to control whether a line will appear underneath the header
line_sep

A numeric value indicating how much the midlines should be separated by space. Default is 3.
extra_css

An HTML only option. CSS defined here will be send to the td cell.
include_empty

Whether empty cells in HTML should also be styled. Default is FALSE.
border_left

T/F option for border on the left side in latex.
border_right

T/F option for border on the right side in latex.

Examples

## Not run: 
x <- knitr::kable(head(mtcars), "html")
# Add a row of header with 3 columns on the top of the table. The column
# span for the 2nd and 3rd one are 5 & 6.
add_header_above(x, c(" ", "Group 1" = 5, "Group 2" = 6))

## End(Not run)

Add indentations to row headers

Description

Add indentations to row headers

Usage

add_indent(
  kable_input,
  positions,
  level_of_indent = 1,
  all_cols = FALSE,
  target_cols = 1
)

Arguments

kable_input

Output of knitr::kable() with format specified
positions

A vector of numeric row numbers for the rows that need to be indented.
level_of_indent

a numeric value for the indent level. Default is 1.
all_cols

T/F whether to apply indentation to all columns
target_cols

A vector of numeric column positions. Default is 1.

Examples

## Not run: 
x <- knitr::kable(head(mtcars), "html")
# Add indentations to the 2nd & 4th row
add_indent(x, c(2, 4), level_of_indent = 1)

## End(Not run)

Render the table as an format-independent image and use it in rmarkdown

Description

This function generates a temporary png file using save_kable and then try to put it in an rmarkdown document using knitr::include_graphics.

Usage

as_image(x, width = NULL, height = NULL, file = NULL, ...)

Arguments

x

kable input. Either HTML or LaTeX
width

Image width in inches. (1 inch = 2.54 cm)
height

Image height in inches. (1 inch = 2.54 cm)
file

By default, as_image saves to an temp file, which works for normal rmarkdown. However if you are using things like xaringan, which can't be a standalone html, you can specify this file be the path you need, eg. "img/something.png"
...

Additional arguments passed to save_kable.

Examples

## Not run: 
library(kableExtra)

kable(mtcars, "latex", booktabs = T) %>%
kable_styling(latex_options = c("striped", "scale_down")) %>%
row_spec(1, color = "red") %>%
as_image()

## End(Not run)

Automatically figuring out the group_row index

Description

This helper function allows users to build the group_row index more quickly and use group_rows in a way that is similar with collapse_rows.

Usage

auto_index(x)

Arguments

x

The index column. A vector. For example 'c("a", "a", "b", "b", "b")“

Specify Cell/Text format

Description

Specify Cell format before it gets into kable

Usage

cell_spec(
  x,
  format,
  bold = FALSE,
  italic = FALSE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  color = NULL,
  background = NULL,
  align = NULL,
  font_size = NULL,
  angle = NULL,
  tooltip = NULL,
  popover = NULL,
  link = NULL,
  new_tab = FALSE,
  extra_css = NULL,
  escape = TRUE,
  background_as_tile = TRUE,
  latex_background_in_cell = TRUE
)

text_spec(
  x,
  format,
  bold = FALSE,
  italic = FALSE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  color = NULL,
  background = NULL,
  align = NULL,
  font_size = NULL,
  angle = NULL,
  tooltip = NULL,
  popover = NULL,
  link = NULL,
  new_tab = FALSE,
  extra_css = NULL,
  escape = TRUE,
  background_as_tile = TRUE,
  latex_background_in_cell = FALSE
)

Arguments

x

Things to be formated. It could be a vector of numbers or strings.
format

Either "html" or "latex". It can also be set through option(knitr.table.format), same as knitr::kable().
bold

T/F for font bold.
italic

T/F for font italic.
monospace

T/F for font monospaced (verbatim)
underline

A T/F value to control whether the text of the selected row need to be underlined
strikeout

A T/F value to control whether the text of the selected row need to be stricked out.
color

A character string for text color. Here please pay attention to the differences in color codes between HTML and LaTeX.
background

A character string for background color. Here please pay attention to the differences in color codes between HTML and LaTeX. Also note that in HTML, background defined in cell_spec won't cover the whole cell.
align

A character string for cell alignment. For HTML, possible values could be l, c, r plus left, center, right, justify, initial and inherit while for LaTeX, you can only choose from l, c & r.
font_size

A numeric input for font size. For HTML, you can also use options including xx-small, x-small, small, medium, large, x-large, xx-large, smaller, larger, initial and inherit.
angle

0-360, degree that the text will rotate. Can be a vector.
tooltip

A vector of strings to be displayed as tooltip. Obviously, this feature is only available in HTML. Read the package vignette to see how to use bootstrap tooltip css to improve the loading speed and look.
popover

Similar with tooltip but can hold more contents. The best way to build a popover is through spec_popover(). If you only provide a text string, it will be used as content. Note that You have to enable this bootstrap module manually. Read the package vignette to see how.
link

A vector of strings for url links. Can be used together with tooltip and popover.
new_tab

T/F for whether to open up the new link in new tab.
extra_css

Extra css text to be passed into the cell
escape

T/F value showing whether special characters should be escaped.
background_as_tile

T/F value indicating if you want to have round cornered tile as background in HTML.
latex_background_in_cell

T/F value. It only takes effect in LaTeX when background provided, Default value is TRUE. If it's TRUE, the background only works in a table cell. If it's FALSE, it works outside of a table environment.

Collapse repeated rows to multirow cell

Description

Collapse same values in columns into multirow cells. This feature does similar things with group_rows. However, unlike group_rows, it analyzes existing columns, finds out rows that can be grouped together, and make them multirow cells. Note that if you want to use column_spec to specify column styles, you should use column_spec before collapse_rows.

Usage

collapse_rows(
  kable_input,
  columns = NULL,
  valign = c("middle", "top", "bottom"),
  latex_hline = c("full", "major", "none", "custom", "linespace"),
  row_group_label_position = c("identity", "stack", "first"),
  custom_latex_hline = NULL,
  row_group_label_fonts = NULL,
  headers_to_remove = NULL,
  target = NULL,
  col_names = TRUE,
  longtable_clean_cut = TRUE
)

Arguments

kable_input

Output of knitr::kable() with format specified
columns

A numeric value or vector indicating in which column(s) rows need to be collapsed.
valign

Select from "top", "middle" (default), "bottom". The reason why "top" is not default is that the multirow package on CRAN win-builder is not up to date. Only used when row_group_label_position is identity.
latex_hline

Option controlling the behavior of adding hlines to table. Choose from full, major, none, custom and linespace.
row_group_label_position

Option controlling positions of row group labels. Choose from identity, stack, or first – the latter behaves like identity when row_group_label_position is top but without using the multirow package.
custom_latex_hline

Numeric column positions whose collapsed rows will be separated by hlines.
row_group_label_fonts

A list of arguments that can be supplied to group_rows function to format the row group label when row_group_label_position is stack.
headers_to_remove

Numeric column positions where headers should be removed when they are stacked.
target

If multiple columns are selected to do collapsing and a target column is specified, this target column will be used to collapse other columns based on the groups of this target column.
col_names

T/F. A LaTeX specific option. If you set col.names be NULL in your kable call, you need to set this option false to let everything work properly.
longtable_clean_cut

T/F with default T. Multirow cell sometimes are displayed incorrectly around pagebreak. This option forces groups to cut before the end of a page. If you have a group that is longer than 1 page, you need to turn off this option.

Examples

## Not run: 
dt <- data.frame(a = c(1, 1, 2, 2), b = c("a", "a", "a", "b"))
x <- knitr::kable(dt, "html")
collapse_rows(x)

## End(Not run)

Specify the look of the selected column

Description

This function allows users to select a column and then specify its look.

Usage

column_spec(
  kable_input,
  column,
  width = NULL,
  bold = FALSE,
  italic = FALSE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  color = NULL,
  background = NULL,
  border_left = FALSE,
  border_right = FALSE,
  width_min = NULL,
  width_max = NULL,
  extra_css = NULL,
  include_thead = FALSE,
  latex_column_spec = NULL,
  latex_valign = "p",
  link = NULL,
  new_tab = TRUE,
  tooltip = NULL,
  popover = NULL,
  image = NULL
)

Arguments

kable_input

Output of knitr::kable() with format specified
column

A numeric value or vector indicating which column(s) to be selected.
width

A character string telling HTML & LaTeX how wide the column needs to be, e.g. "10cm", "3in" or "30em".
bold

T/F value or vector to control whether the text of the selected column need to be bolded.
italic

T/F value or vector to control whether the text of the selected column need to be emphasized.
monospace

T/F value or vector to control whether the text of the selected column need to be monospaced (verbatim)
underline

T/F value or vector to control whether the text of the selected row need to be underlined
strikeout

T/F value or vector to control whether the text of the selected row need to be striked out.
color

A character string or vector for column text color. Here please pay attention to the differences in color codes between HTML and LaTeX.
background

A character string or vector for column background color. Here please pay attention to the differences in color codes between HTML and LaTeX.
border_left

A logical variable indicating whether there should be a border line on the left of the selected column. In HTML, you can also pass in a character string for the CSS of the border line
border_right

A logical variable indicating whether there should be a border line on the right of the selected column. In HTML, you can also pass in a character string for the CSS of the border line
width_min

Only for HTML table. Normal column width will automatically collapse when the window cannot hold enough contents. With this width_min, you can set up a column with a width that won't collapse even when the window is not wide enough.
width_max

Only for HTML table. width_max defines the maximum width of table columns.
extra_css

A vector of extra css text to be passed into the cells of the column.
include_thead

T/F. A HTML only feature to contoll whether the header row will be manipulated. Default is FALSE.
latex_column_spec

Only for LaTeX tables. Code to replace the column specification. If not NULL, will override all other arguments.
latex_valign

vertical alignment. Only works when you specified column width. Choose among p, m, b.
link

A vector of strings for url links.
new_tab

T/F for whether to open up the new link in new tab
tooltip

A vector of strings to be displayed as tooltip. Obviously, this feature is only available in HTML. Read the package vignette to see how to use bootstrap tooltip css to improve the loading speed and look.
popover

Similar with tooltip but can hold more contents. The best way to build a popover is through spec_popover(). If you only provide a text string, it will be used as content. Note that You have to enable this bootstrap module manually. Read the package vignette to see how.
image

Vector of image paths.

Details

Use latex_column_spec in a LaTeX table to change or customize the column specification. Because of the way it is handled internally, any backslashes must be escaped.

Examples

## Not run: 
x <- knitr::kable(head(mtcars), "html")
column_spec(x, 1:2, width = "20em", bold = TRUE, italic = TRUE)
x <- knitr::kable(head(mtcars), "latex", booktabs = TRUE)
column_spec(x, 1, latex_column_spec = ">{\\\\color{red}}c")

## End(Not run)

Add footnote (new)

Description

footnote provides a more flexible way to add footnote. You can add mutiple sets of footnote using differeny notation system. It is also possible to specify footnote section header one by one and print footnotes as a chunk of texts.

Usage

footnote(
  kable_input,
  general = NULL,
  number = NULL,
  alphabet = NULL,
  symbol = NULL,
  footnote_order = c("general", "number", "alphabet", "symbol"),
  footnote_as_chunk = FALSE,
  escape = TRUE,
  threeparttable = FALSE,
  fixed_small_size = FALSE,
  general_title = "Note: ",
  number_title = "",
  alphabet_title = "",
  symbol_title = "",
  title_format = "italic",
  symbol_manual = NULL
)

Arguments

kable_input

HTML or LaTeX table generated by knitr::kable
general

Text for general footnote comments. Footnotes in this section won't be labeled with any notations
number

A vector of footnote texts. Footnotes here will be numbered. There is no upper cap for the number of footnotes here
alphabet

A vector of footnote texts, Footnotes here will be labeled with abc. The vector here should not have more than 26 elements.
symbol

A vector of footnote texts, Footnotes here will be labeled with special symbols. The vector here should not have more than 20 elements.
footnote_order

The order of how to arrange general, number, alphabet and symbol.
footnote_as_chunk

T/F value. Default is FALSE. It controls whether the footnotes should be printed in a chunk (without line break).
escape

T/F value. It controls whether the contents and titles should be escaped against HTML or LaTeX. Default is TRUE.
threeparttable

T/F value for whether to use LaTeX package threeparttable. Threeparttable will force the width of caption and footnotes be the width of the original table. It's useful when you have long paragraph of footnotes.
fixed_small_size

T/F When you want to keep the footnote small after specifying large font size with the kable_styling() (e.g. ideal font for headers and table content with small font in footnotes).
general_title

Section header for general footnotes. Default is "Note: ".
number_title

Section header for number footnotes. Default is "".
alphabet_title

Section header for alphabet footnotes. Default is "".
symbol_title

Section header for symbol footnotes. Default is "".
title_format

Choose from "italic"(default), "bold" and "underline". Multiple options are possible.
symbol_manual

User can manually supply a vector of either html or latex symbols. For example, symbol_manual = c('*', '\\\\dag', '\\\\ddag').'

Examples

## Not run: 
dt <- mtcars[1:5, 1:5]
footnote(knitr::kable(dt, "html"), alphabet = c("Note a", "Note b"))

## End(Not run)

Footnote marker

Description

Put footnote mark in superscription in table. Unless you are using it in the caption of kable, you will need to put escape = F in kable (similar with cell_spec). Again, similar with cell_spec, the format option here can read default value from global option knitr.table.format.

Usage

footnote_marker_number(x, format, double_escape = FALSE)

footnote_marker_alphabet(x, format, double_escape = FALSE)

footnote_marker_symbol(x, format, double_escape = FALSE)

Arguments

x

a number. For example, for footnote_marker_alphabet(2) will return "b" in HTML.
format

Either html or latex. All functions here can read default value from global option knitr.table.format.
double_escape

T/F if output is in LaTeX, whether it should be double escaped. If you are using footnote_marker in ⁠group_rows`` labeling row or ⁠add_header_above⁠, you need to set this to be ⁠TRUE'.

Examples

## Not run: 
dt <- mtcars[1:5, 1:5]
colnames(dt)[1] <- paste0("mpg", footnote_marker_alphabet(2, "html"))
rownames(dt)[2] <- paste0(rownames(dt)[2], footnote_marker_alphabet(1, "html"))
footnote(knitr::kable(dt, "html"), alphabet = c("Note a", "Note b"))

## End(Not run)

Helper functions to use various graphics devices

Description

These helper functions generalize the use of strings (e.g., "svg", "pdf") or graphic device functions (e.g., grDevices::svg, grDevices::pdf) for in-table plots.

Usage

graphics_dev(filename, width, height, res, ..., dev)

is_svg(dev)

dev_chr(dev)

Arguments

filename

Passed through to the graphics device.
width, height

Plot dimensions in pixels.
res

The resolution of the plot; default is 300.
...

extra parameters passing to the graphics-device function.
dev

Character (e.g., "svg", "pdf") or function (e.g., grDevices::svg, grDevices::pdf).

Details

  • graphics_dev generalizes the use of 'res' and plot dimensions across graphic devices. Raster-based devices (e.g., 'png', 'jpeg', 'tiff', 'bmp') tend to use 'res' and the width/height units default to pixels. All other devices (e.g., 'pdf', 'svg') tend to use inches as the default units for width/height, and error when 'res' is provided.

    The current heuristic is the look for the 'res' argument in the function's formals; if that is present, then it is assumed that the default units are in pixels, so 'width', 'height', and 'res' are passed through unmodified. If 'res' is not present, then 'width' and 'height' are converted from pixels to inches, and 'res' is not passed to the function

    Another purpose of this function is to generalize the different graphic functions' use of 'file=' versus 'filename='.

  • is_svg determines if the plot device is svg-like, typically one of ⁠"svg", ⁠grDevices::svg⁠, or ⁠svglite::svglite'

  • dev_chr determines the filename extension for the applicable plot function; when dev is a string, then it is returned unchanged; when dev is a function, the formals of the function are checked for clues (i.e., default value of a ⁠file=⁠ argument)

Value

'graphics_dev': nothing, a plot device is opened

'is_svg': logical

dev_chr: character

Functions

  • graphics_dev: Generalize 'res' and 'filename across dev functions

  • is_svg: Determine if plot device is svg-like

  • dev_chr: Determine filename extension

Put a few rows of a table into one category

Description

Group a few rows in a table together under a label.

Usage

group_rows(
  kable_input,
  group_label = NULL,
  start_row = NULL,
  end_row = NULL,
  index = NULL,
  label_row_css = "border-bottom: 1px solid;",
  latex_gap_space = "0.3em",
  escape = TRUE,
  latex_align = "l",
  latex_wrap_text = FALSE,
  colnum = NULL,
  bold = TRUE,
  italic = FALSE,
  hline_before = FALSE,
  hline_after = FALSE,
  extra_latex_after = NULL,
  indent = TRUE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  color = NULL,
  background = NULL
)

pack_rows(
  kable_input,
  group_label = NULL,
  start_row = NULL,
  end_row = NULL,
  index = NULL,
  label_row_css = "border-bottom: 1px solid;",
  latex_gap_space = "0.3em",
  escape = TRUE,
  latex_align = "l",
  latex_wrap_text = FALSE,
  colnum = NULL,
  bold = TRUE,
  italic = FALSE,
  hline_before = FALSE,
  hline_after = FALSE,
  extra_latex_after = NULL,
  indent = TRUE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  color = NULL,
  background = NULL
)

Arguments

kable_input

Output of knitr::kable() with format specified
group_label

A character string for the name of the group
start_row

A numeric value that tells the function in which row the group starts. Note that the counting excludes header rows and other group labeling rows
end_row

A numeric value that tells the function in which row the group ends.
index

A named vector providing the index for robust row-grouping tasks. Basically, you can use it in the same way as add_header_above().
label_row_css

A character string for any customized css used for the labeling row. By default, the labeling row will have a solid black line underneath. Only useful for HTML documents.
latex_gap_space

A character value telling LaTeX how large the gap between the previous row and the group labeling row. Only useful for LaTeX documents.
escape

A T/F value showing whether special characters should be escaped.
latex_align

Adjust justification of group_label in latex only. Value should be "c" for centered on row, "r" for right justification, or "l" for left justification. Default Value is "l" If using html, the alignment can be set by using the label_row_css parameter.
latex_wrap_text

T/F for wrapping long text. Default is off. Whenever it is turned on, the table will take up the entire line. It's recommended to use this with full_width in kable_styling.
colnum

A numeric that determines how many columns the text should span. The default setting will have the text span the entire length.
bold

A T/F value to control whether the text should be bolded.
italic

A T/F value to control whether the text should to be emphasized.
hline_before

A T/F value that addes a horizontal line before the group_row label. Default value is False.
hline_after

A replicate of hline.after in xtable. It addes a hline after the row
extra_latex_after

Extra LaTeX text to be added after the row.
indent

A T/F value to control whether list items are indented.
monospace

T/F value to control whether the text of the selected column need to be monospaced (verbatim)
underline

T/F value to control whether the text of the selected row need to be underlined
strikeout

T/F value to control whether the text of the selected row need to be striked out.
color

A character string for column text color. Here please pay attention to the differences in color codes between HTML and LaTeX.
background

A character string for column background color. Here please pay attention to the differences in color codes between HTML and LaTeX.

Examples

## Not run: 
x <- knitr::kable(head(mtcars), "html")
# Put Row 2 to Row 5 into a Group and label it as "Group A"
pack_rows(x, "Group A", 2, 5)

## End(Not run)

Separate table headers and add additional header rows based on grouping

Description

When you create a summary table for either model or basic summary stats in R, you usually end up having column names in the form of "a_mean", "a_sd", "b_mean" and "b_sd". This function streamlines the process of renaming these column names and adding extra header rows using add_header_above.

Usage

header_separate(kable_input, sep = "[^[:alnum:]]+", ...)

Arguments

kable_input

Output of knitr::kable() with format specified
sep

A regular expression separator between groups. The default value is a regular expression that matches any sequence of non-alphanumeric values.

HTML dependency for Twitter bootstrap (table only)

Description

HTML dependency for Twitter bootstrap (table only)

Usage

html_dependency_bsTable()

HTML dependency for js script to enable bootstrap tooltip and popup message

Description

HTML dependency for js script to enable bootstrap tooltip and popup message

Usage

html_dependency_kePrint()

HTML dependency for lightable

Description

HTML dependency for lightable

Usage

html_dependency_lightable()

Deprecated

Description

deprecated

Usage

kable_as_image(
  kable_input,
  filename = NULL,
  file_format = "png",
  latex_header_includes = NULL,
  keep_pdf = FALSE,
  density = 300,
  keep_tex = FALSE
)

Arguments

kable_input

Raw LaTeX code to generate a table. It doesn't have to came from kable or kableExtra.
filename

Character String. If specified, the image will be saved under the specified (path &) name. You don't need to put file format like ".png" here.
file_format

Character String to specify image format, such as png, jpeg, gif, tiff, etc. Default is png.
latex_header_includes

A character vector of extra LaTeX header stuff. Each element is a row. You can have things like c("\\\\usepackage{threeparttable}", "\\\\usepackage{icons}") You could probably add your language package here if you use non-English text in your table, such as ⁠\\\\usepackage[magyar]{babel}⁠.
keep_pdf

A T/F option to control if the mid-way standalone pdf should be kept. Default is FALSE.
density

Resolution to read the PDF file. Default value is 300, which should be sufficient in most cases.
keep_tex

A T/F option to control if the latex file that is initially created should be kept. Default is FALSE.

Read HTML kable as XML

Description

This function will read kable as a xml file

Usage

kable_as_xml(x)

Arguments

x

kable or kableExtra object

Alternative HTML themes

Description

kableExtra uses the built-in bootstrap themes by default in kable_styling(). Alternatively, you can use a customized table themes for your table. This lightable table style sheet comes with three formats, namely lightable-minimal, lightable-classic, lightable-material and lightable-material-dark with hover and striped options.

Usage

kable_classic(
  kable_input,
  lightable_options = "basic",
  html_font = "\"Arial Narrow\", \"Source Sans Pro\", sans-serif",
  ...
)

kable_classic_2(
  kable_input,
  lightable_options = "basic",
  html_font = "\"Arial Narrow\", \"Source Sans Pro\", sans-serif",
  ...
)

kable_minimal(
  kable_input,
  lightable_options = "basic",
  html_font = "\"Trebuchet MS\", verdana, sans-serif",
  ...
)

kable_material(
  kable_input,
  lightable_options = "basic",
  html_font = "\"Source Sans Pro\", helvetica, sans-serif",
  ...
)

kable_material_dark(
  kable_input,
  lightable_options = "basic",
  html_font = "\"Source Sans Pro\", helvetica, sans-serif",
  ...
)

kable_paper(
  kable_input,
  lightable_options = "basic",
  html_font = "\"Arial Narrow\", arial, helvetica, sans-serif",
  ...
)

Arguments

kable_input

A HTML kable object.
lightable_options

Options to customize lightable. Similar with bootstrap_options in kable_styling. Choices include basic, striped and hover.
html_font

A string for HTML css font. For example, html_font = '"Arial Narrow", arial, helvetica, sans-serif'.
...

Everything else you need to specify in kable_styling.

HTML table attributes

Description

This function provides a cleaner approach to modify the style of HTML tables other than using the table.attr option in knitr::kable(). Note that those bootstrap options requires Twitter bootstrap theme, which is not avaiable in some customized template being loaded.

Usage

kable_styling(
  kable_input,
  bootstrap_options = "basic",
  latex_options = "basic",
  full_width = NULL,
  position = "center",
  font_size = NULL,
  row_label_position = "l",
  repeat_header_text = "\\textit{(continued)}",
  repeat_header_method = c("append", "replace"),
  repeat_header_continued = FALSE,
  stripe_color = "gray!6",
  stripe_index = NULL,
  latex_table_env = NULL,
  protect_latex = TRUE,
  table.envir = "table",
  fixed_thead = FALSE,
  htmltable_class = NULL,
  html_font = NULL,
  wraptable_width = "0pt"
)

Arguments

kable_input

Output of knitr::kable() with format specified
bootstrap_options

A character vector for bootstrap table options. Please see package vignette or visit the w3schools' Bootstrap Page for more information. Possible options include basic, striped, bordered, hover, condensed, responsive and none.
latex_options

A character vector for LaTeX table options. Please see package vignette for more information. Possible options include basic, striped, hold_position, HOLD_position, scale_down & repeat_header. striped will add alternative row colors to the table. It will imports LaTeX package xcolor if enabled. hold_position will "hold" the floating table to the exact position. It is useful when the LaTeX table is contained in a table environment after you specified captions in kable(). It will force the table to stay in the position where it was created in the document. A stronger version: HOLD_position requires the float package and specifies ⁠[H]⁠. scale_down is useful for super wide table. It will automatically adjust the table to page width. repeat_header in only meaningful in a longtable environment. It will let the header row repeat on every page in that long table.
full_width

A TRUE or FALSE variable controlling whether the HTML table should have 100\ the preferable format for full_width. If not specified, a HTML table will have full width by default but this option will be set to FALSE for a LaTeX table
position

A character string determining how to position the table on a page. Possible values include left, center, right, float_left and float_right. Please see the package doc site for demonstrations. For a LaTeX table, if ⁠float_*⁠ is selected, LaTeX package wrapfig will be imported.
font_size

A numeric input for table font size
row_label_position

A character string determining the justification of the row labels in a table. Possible values inclued l for left, c for center, and r for right. The default value is l for left justifcation.
repeat_header_text

LaTeX option. A text string you want to append on or replace the caption.
repeat_header_method

LaTeX option, can either be append(default) or replace
repeat_header_continued

T/F or a text string. Whether or not to put a continued mark on the second page of longtable. If you put in text, we will use this text as the "continued" mark.
stripe_color

LaTeX option allowing users to pick a different color for their strip lines. This option is not available in HTML
stripe_index

LaTeX option allowing users to customize which rows should have stripe color.
latex_table_env

LaTeX option. A character string to define customized table environment such as tabu or tabularx.You shouldn't expect all features could be supported in self-defined environments.
protect_latex

If TRUE, LaTeX code embedded between dollar signs will be protected from HTML escaping.
table.envir

LaTeX floating table environment. kable_style will put a plain no-caption table in a table environment in order to center the table. You can specify this option to things like ⁠table*⁠ or ⁠float*⁠ based on your need.
fixed_thead

HTML table option so table header row is fixed at top. Values can be either T/F or list(enabled = T/F, background = "anycolor").
htmltable_class

Options to use the in-house lightable themes. Choices include lightable-minimal, lightable-classic, lightable-classic-2, lightable-material, lightable-striped and lightable-hover. If you have your customized style sheet loaded which defines your own table class, you can also load it here.
html_font

A string for HTML css font. For example, html_font = '"Arial Narrow", arial, helvetica, sans-serif'.
wraptable_width

Width of the wraptable area if you specify "float_left/right" for latex table. Default is "0pt" for automated determination but you may specify it manually.

Details

For LaTeX, if you use other than English environment

  • all tables are converted to 'UTF-8'. If you use, for example, Hungarian characters on a Windows machine, make sure to use Sys.setlocale("LC_ALL","Hungarian") to avoid unexpected conversions.

  • protect_latex = TRUE has no effect.

For HTML,

  • protect_latex = TRUE is for including complicated math in HTML output. The LaTeX may not include dollar signs even if they are escaped. Pandoc's rules for recognizing embedded LaTeX are used.

Examples

## Not run: 
x_html <- knitr::kable(head(mtcars), "html")
kable_styling(x_html, "striped", position = "left", font_size = 7)

x_latex <- knitr::kable(head(mtcars), "latex")
kable_styling(x_latex, latex_options = "striped", position = "float_left")

## End(Not run)

LaTeX Packages

Description

This function shows all LaTeX packages that is supposed to be loaded for this package in a rmarkdown yaml format.

Usage

kableExtra_latex_packages()

Wrapper function of knitr::kable

Description

knitr's kable function is the foundation of this package. However, it has many latex/html specific arguments hidden under the ground unless you check its source code. This wrapper function is created to provide better documentation (and auto-complete yay) and at the same time, solve the auto format setting in a better way.

Usage

kbl(
  x,
  format,
  digits = getOption("digits"),
  row.names = NA,
  col.names = NA,
  align,
  caption = NULL,
  label = NULL,
  format.args = list(),
  escape = TRUE,
  table.attr = "",
  booktabs = FALSE,
  longtable = FALSE,
  valign = "t",
  position = "",
  centering = TRUE,
  vline = getOption("knitr.table.vline", if (booktabs) "" else "|"),
  toprule = getOption("knitr.table.toprule", if (booktabs) "\\toprule" else
    "\\hline"),
  bottomrule = getOption("knitr.table.bottomrule", if (booktabs) "\\bottomrule" else
    "\\hline"),
  midrule = getOption("knitr.table.midrule", if (booktabs) "\\midrule" else
    "\\hline"),
  linesep = if (booktabs) c("", "", "", "", "\\addlinespace") else "\\hline",
  caption.short = "",
  table.envir = if (!is.null(caption)) "table",
  ...
)

Arguments

x

For kable(), x is an R object, which is typically a matrix or data frame. For kables(), a list with each element being a returned value from kable().
format

A character string. Possible values are latex, html, pipe (Pandoc's pipe tables), simple (Pandoc's simple tables), and rst. The value of this argument will be automatically determined if the function is called within a knitr document. The format value can also be set in the global option knitr.table.format. If format is a function, it must return a character string.
digits

Maximum number of digits for numeric columns, passed to round(). This can also be a vector of length ncol(x), to set the number of digits for individual columns.
row.names

Logical: whether to include row names. By default, row names are included if rownames(x) is neither NULL nor identical to 1:nrow(x).
col.names

A character vector of column names to be used in the table.
align

Column alignment: a character vector consisting of 'l' (left), 'c' (center) and/or 'r' (right). By default or if align = NULL, numeric columns are right-aligned, and other columns are left-aligned. If length(align) == 1L, the string will be expanded to a vector of individual letters, e.g. 'clc' becomes c('c', 'l', 'c'), unless the output format is LaTeX.
caption

The table caption.
label

The table reference label. By default, the label is obtained from knitr::opts_current$get('label'). To disable the label, use label = NA.
format.args

A list of arguments to be passed to format() to format table values, e.g. list(big.mark = ',').
escape

Boolean; whether to escape special characters when producing HTML or LaTeX tables. When escape = FALSE, you have to make sure that special characters will not trigger syntax errors in LaTeX or HTML.
table.attr

A character string for addition HTML table attributes. This is convenient if you simply want to add a few HTML classes or styles. For example, you can put 'class="table" style="color: red"'.
booktabs

T/F for whether to enable the booktabs format for tables. I personally would recommend you turn this on for every latex table except some special cases.
longtable

T/F for whether to use the longtable format. If you have a table that will span over two or more pages, you will have to turn this on.
valign

You probably won't need to adjust this latex option very often. If you are familar with latex tables, this is the optional position for the tabular environment controling the vertical position of the table relative to the baseline of the surrounding text. Possible choices are b, c and t (default).
position

This is the "real" or say floating position for the latex table environment. The kable only puts tables in a table environment when a caption is provided. That is also the reason why your tables will be floating around if you specify captions for your table. Possible choices are h (here), t (top, default), b (bottom) and p (on a dedicated page).
centering

T (default)/F. Whether to center tables in the table environment.
vline

vertical separator. Default is nothing for booktabs tables but "|" for normal tables.
toprule

toprule. Default is hline for normal table but toprule for booktabs tables.
bottomrule

bottomrule. Default is hline for normal table but bottomrule for booktabs tables.
midrule

midrule. Default is hline for normal table but midrule for booktabs tables.
linesep

By default, in booktabs tables, kable insert an extra space every five rows for clear display. If you don't want this feature or if you want to do it in a different pattern, you can consider change this option. The default is c(”, ”, ”, ”, '\addlinespace'). Also, if you are not using booktabs, but you want a cleaner display, you can change this to ”.
caption.short

Another latex feature. Short captions for tables
table.envir

You probably don't need to change this as well. The default setting is to put a table environment outside of tabular if a caption is provided.
...

Other arguments (see Examples and References).

Print the table on an isolated landscape page in PDF

Description

This function will put the table on an single landscape page. It's useful for wide tables that cann't be printed on a portrait page.

Usage

landscape(kable_input, margin = NULL)

Arguments

kable_input

Output of knitr::kable() with format specified
margin

Customizable page margin for special needs. Values can be "1cm", "1in" or similar.

Examples

## Not run: 
landscape(knitr::kable(head(mtcars), "latex"))

## End(Not run)

Make linebreak in LaTeX Table cells

Description

This function generates LaTeX code of makecell so that users can have linebreaks in their table

Usage

linebreak(x, align = c("l", "c", "r"), double_escape = F, linebreaker = "\n")

Arguments

x

A character vector
align

Choose from "l", "c" or "r". Defaults to "l".
double_escape

Whether special character should be double escaped. Default is FALSE.
linebreaker

Symbol for linebreaks to replace. Default is ⁠\\n⁠.

Convert arguments for a single call into Map-able args

Description

Convert arguments for a single call into Map-able args

Usage

listify_args(
  ...,
  lengths = NA,
  passthru = c("x", "y"),
  notlen1vec = c("lim", "xlim", "ylim"),
  notlen1lst = c("minmax", "min", "max"),
  ignore = c("same_lim")
)

Arguments

...

Arbitrary arguments to be possibly converted into lists of arguments.
lengths

Allowable lengths of the arguments, typically 1 and the length of the main variable (e.g., "x"). If 'NA' (default), it is not enforced.
passthru

Character vector of variables to pass through with no conversion to lists of values. Extra names (not provided in ...) are ignored.
notlen1vec

Character vector of variables that are known to be length over 1 for a single plot call, so it will always be list-ified and extra care to ensure it is grouped correctly. Extra names (not provided in ...) are ignored.
notlen1lst

Character vector of variables that are lists, so the inner list length is not checked/enforced. (For example, if a single plot call takes an argument list(a=1,b=2,d=3) and the multi-data call creates three plots, then a naive match might think that the first plot would get list(a=1), second plot gets list(b=2), etc. Adding that list-argument to this 'notlen1lst' will ensure that the full list is passed correctly.) Extra names (not provided in ...) are ignored.
ignore

Character vector of variables to ignore, never returned. (Generally one can control this by not adding the variable in the first place, but having this here allows some sanity checks and/or programmatic usage.)

Value

list, generally a list of embedded lists

Magic mirror that returns kable's attributes

Description

Mirror mirror tell me, how does this kable look like?

Usage

magic_mirror(kable_input)

Arguments

kable_input

The output of kable

Examples

magic_mirror(knitr::kable(head(mtcars), "html"))

Combine file (or svg text) and parameters into a 'kableExtraInlinePlots' object

Description

Combine file (or svg text) and parameters into a 'kableExtraInlinePlots' object

Usage

make_inline_plot(filename, file_ext, dev, width, height, res, del = TRUE)

Arguments

filename

Passed through to the graphics device.
file_ext

Character, something like "png".
dev

Character (e.g., "svg", "pdf") or function (e.g.,
width, height

Plot dimensions in pixels.
res

The resolution of the plot; default is 300.
del

If the file is svg-like, then the default action is to read the file into an embedded SVG object; once done, the file is no longer used. The default action is to delete this file early, set this to 'FALSE' to keep the file.

Value

list object, with class 'kableExtraInlinePlots'

Remove columns

Description

Remove columns

Usage

remove_column(kable_input, columns)

Arguments

kable_input

Output of knitr::kable() with format specified
columns

A numeric value or vector indicating in which column(s) rows need to be removed

Examples

## Not run: 
remove_column(kable(mtcars), 1)

## End(Not run)

Rmarkdown Format

Description

If the export format of the Rmarkdown document exist,

Usage

rmd_format()

Specify the look of the selected row

Description

This function allows users to select a row and then specify its look. It can also specify the format of the header row when row = 0.

Usage

row_spec(
  kable_input,
  row,
  bold = FALSE,
  italic = FALSE,
  monospace = FALSE,
  underline = FALSE,
  strikeout = FALSE,
  color = NULL,
  background = NULL,
  align = NULL,
  font_size = NULL,
  angle = NULL,
  extra_css = NULL,
  hline_after = FALSE,
  extra_latex_after = NULL
)

Arguments

kable_input

Output of knitr::kable() with format specified
row

A numeric value or vector indicating which row(s) to be selected. You don't need to count in header rows or group labeling rows.
bold

A T/F value to control whether the text of the selected row need to be bolded.
italic

A T/F value to control whether the text of the selected row need to be emphasized.
monospace

A T/F value to control whether the text of the selected row need to be monospaced (verbatim)
underline

A T/F value to control whether the text of the selected row need to be underlined
strikeout

A T/F value to control whether the text of the selected row need to be stricked out.
color

A character string for row text color. For example, "red" or "#BBBBBB".
background

A character string for row background color. Here please pay attention to the differences in color codes between HTML and LaTeX.
align

A character string for cell alignment. For HTML, possible values could be l, c, r plus left, center, right, justify, initial and inherit while for LaTeX, you can only choose from l, c & r.
font_size

A numeric input for font size. For HTML, you can also use options including xx-small, x-small, small, medium, large, x-large, xx-large, smaller, larger, initial and inherit.
angle

0-360, degree that the text will rotate.
extra_css

Extra css text to be passed into the cells of the row. Note that it's not for the whole row.
hline_after

T/F. A replicate of hline.after in xtable. It addes a hline after ther row
extra_latex_after

Extra LaTeX text to be added after the row. Similar with add.to.row in xtable

Examples

## Not run: 
x <- knitr::kable(head(mtcars), "html")
row_spec(x, 1:2, bold = TRUE, italic = TRUE)

## End(Not run)

Save kable to files

Description

Save kable to files

Usage

save_kable(
  x,
  file,
  bs_theme = "simplex",
  self_contained = TRUE,
  extra_dependencies = NULL,
  ...,
  latex_header_includes = NULL,
  keep_tex = FALSE,
  density = 300
)

Arguments

x

A piece of HTML code for tables, usually generated by kable and kableExtra
file

save to files. If the input table is in HTML and the output file ends with .png, .pdf and .jpeg, webshot will be used to do the conversion.
bs_theme

Which Bootstrap theme to use
self_contained

Will the files be self-contained?
extra_dependencies

Additional HTML dependencies. For example, ⁠list(⁠
...

Additional variables being passed to webshot::webshot. This is for HTML only.
latex_header_includes

A character vector of extra LaTeX header stuff. Each element is a row. You can have things like c("\\\\usepackage{threeparttable}", "\\\\usepackage{icons}") You could probably add your language package here if you use non-English text in your table, such as ⁠\\\\usepackage[magyar]{babel}⁠.
keep_tex

A T/F option to control if the latex file that is initially created should be kept. Default is FALSE.
density

density argument passed to magick if needed. Default is 300.

Examples

## Not run: 
library(kableExtra)

kable(mtcars[1:5, ], "html") %>%
  kable_styling("striped") %>%
  row_spec(1, color = "red") %>%
  save_kable("inst/test.pdf")

## End(Not run)

Put a HTML table into a scrollable box

Description

This function will put a HTML kable object in a fixed-height, fixed-width or both box and make it scrollable.

Usage

scroll_box(
  kable_input,
  height = NULL,
  width = NULL,
  box_css = "border: 1px solid #ddd; padding: 5px; ",
  extra_css = NULL,
  fixed_thead = TRUE
)

Arguments

kable_input

A HTML kable object
height

A character string indicating the height of the box, e.g. "50px"
width

A character string indicating the width of the box, e.g. "100px"
box_css

CSS text for the box
extra_css

Extra CSS styles
fixed_thead

HTML table option so table header row is fixed at top. Values can be either T/F or list(enabled = T/F, background = "anycolor").

Examples

## Not run: 
# Specify table size by pixels
kable(cbind(mtcars, mtcars), "html") %>%
    kable_styling() %>%
    scroll_box(width = "500px", height = "200px")

# Specify by percent
kable(cbind(mtcars, mtcars), "html") %>%
    kable_styling() %>%
    scroll_box(width = "100%", height = "200px")

## End(Not run)

Generate rotation angle for continuous values

Description

Generate rotation angle for continuous values

Usage

spec_angle(x, begin, end, scale_from = NULL)

Arguments

x

continuous vectors of values
begin

Smallest degree to rotate. Default is 0
end

Largest degree to rotate. Default is 359.
scale_from

input range (vector of length two). If not given, is calculated from the range of x

Helper functions to generate inline sparklines

Description

These functions helps you quickly generate sets of sparkline style plots using base R plotting system. Currently, we support histogram, boxplot, line, scatter, pointrange, barplot plots. You can use them together with column_spec to generate inline plot in tables. By default, this function will save images in a folder called "kableExtra" and return the address of the file.

Usage

spec_barplot(
  x,
  devwidth = 200,
  devheight = 40,
  res = 300,
  beside = F,
  horiz = F,
  same_lim = TRUE,
  lim = NULL,
  xaxt = "n",
  yaxt = "n",
  ann = FALSE,
  col = NULL,
  border = NA,
  dir = if (is_latex()) rmd_files_dir() else tempdir(),
  file = NULL,
  file_type = if (is_latex()) "pdf" else svglite::svglite,
  ...
)

Arguments

x

Vector of values or List of vectors of values.
res

The resolution of the plot. Default is 300.
same_lim

T/F. If x is a list of vectors, should all the plots be plotted in the same range? Default is True.
lim

Manually specify plotting range in the form of c(0, 10).
xaxt

On/Off for xaxis text
yaxt

On/Off for yaxis text
ann

On/Off for annotations (titles and axis titles)
col

Color for the fill of the histogram bar/boxplot box.
border

Color for the border.
dir

Directory of where the images will be saved.
file

File name. If not provided, a random name will be used
file_type

Graphic device. Can be character (e.g., "pdf") or a graphics device function (grDevices::pdf). This defaults to "pdf" if the rendering is in LaTeX and "svg" otherwise.
...

extraparameters passing to boxplot
width

The width of the plot in pixel
height

The height of the plot in pixel
add_label

For boxplot. T/F to add labels for min, mean and max.
label_digits

If T for add_label, rounding digits for the label. Default is 2.
boxlty

Boxplot - box boarder type
medcol

Boxplot - median line color
medlwd

Boxplot - median line width

Helper functions to generate inline sparklines

Description

These functions helps you quickly generate sets of sparkline style plots using base R plotting system. Currently, we support histogram, boxplot, line, scatter and pointrange plots. You can use them together with column_spec to generate inline plot in tables. By default, this function will save images in a folder called "kableExtra" and return the address of the file.

Usage

spec_boxplot(
  x,
  width = 200,
  height = 50,
  res = 300,
  add_label = FALSE,
  label_digits = 2,
  same_lim = TRUE,
  lim = NULL,
  xaxt = "n",
  yaxt = "n",
  ann = FALSE,
  col = "lightgray",
  border = NULL,
  boxlty = 0,
  medcol = "red",
  medlwd = 1,
  dir = if (is_latex()) rmd_files_dir() else tempdir(),
  file = NULL,
  file_type = if (is_latex()) "pdf" else svglite::svglite,
  ...
)

Arguments

x

Vector of values or List of vectors of values.
width

The width of the plot in pixel
height

The height of the plot in pixel
res

The resolution of the plot. Default is 300.
add_label

For boxplot. T/F to add labels for min, mean and max.
label_digits

If T for add_label, rounding digits for the label. Default is 2.
same_lim

T/F. If x is a list of vectors, should all the plots be plotted in the same range? Default is True.
lim

Manually specify plotting range in the form of c(0, 10).
xaxt

On/Off for xaxis text
yaxt

On/Off for yaxis text
ann

On/Off for annotations (titles and axis titles)
col

Color for the fill of the histogram bar/boxplot box.
border

Color for the border.
boxlty

Boxplot - box boarder type
medcol

Boxplot - median line color
medlwd

Boxplot - median line width
dir

Directory of where the images will be saved.
file

File name. If not provided, a random name will be used
file_type

Graphic device. Can be character (e.g., "pdf") or a graphics device function (grDevices::pdf). This defaults to "pdf" if the rendering is in LaTeX and "svg" otherwise.
...

extraparameters passing to boxplot

Generate viridis Color code for continuous values

Description

Generate viridis Color code for continuous values

Usage

spec_color(
  x,
  alpha = 1,
  begin = 0,
  end = 1,
  direction = 1,
  option = "D",
  na_color = "#BBBBBB",
  scale_from = NULL
)

Arguments

x

continuous vectors of values
alpha

The alpha transparency, a number in [0,1], see argument alpha in hsv.
begin

The (corrected) hue in [0,1] at which the color map begins.
end

The (corrected) hue in [0,1] at which the color map ends.
direction

Sets the order of colors in the scale. If 1, the default, colors are ordered from darkest to lightest. If -1, the order of colors is reversed.
option

A character string indicating the color map option to use. Eight options are available:

  • "magma" (or "A")

  • "inferno" (or "B")

  • "plasma" (or "C")

  • "viridis" (or "D")

  • "cividis" (or "E")

  • "rocket" (or "F")

  • "mako" (or "G")

  • "turbo" (or "H")

na_color

color code for NA values
scale_from

input range (vector of length two). If not given, is calculated from the range of x

Generate common font size for continuous values

Description

Generate common font size for continuous values

Usage

spec_font_size(x, begin = 8, end = 16, na_font_size = 12, scale_from = NULL)

Arguments

x

continuous vectors of values
begin

Smalles font size to be used. Default is 10.
end

Largest font size. Default is 20.
na_font_size

font size for NA values
scale_from

input range (vector of length two). If not given, is calculated from the range of x

Helper functions to generate inline sparklines

Description

These functions helps you quickly generate sets of sparkline style plots using base R plotting system. Currently, we support histogram, boxplot, line, scatter and pointrange plots. You can use them together with column_spec to generate inline plot in tables. By default, this function will save images in a folder called "kableExtra" and return the address of the file.

Usage

spec_hist(
  x,
  width = 200,
  height = 50,
  res = 300,
  breaks = "Sturges",
  same_lim = TRUE,
  lim = NULL,
  xaxt = "n",
  yaxt = "n",
  ann = FALSE,
  col = "lightgray",
  border = NULL,
  dir = if (is_latex()) rmd_files_dir() else tempdir(),
  file = NULL,
  file_type = if (is_latex()) "pdf" else svglite::svglite,
  ...
)

Arguments

x

Vector of values or List of vectors of values.
width

The width of the plot in pixel
height

The height of the plot in pixel
res

The resolution of the plot. Default is 300.
breaks

The break option in hist. Default is "Sturges" but you can also provide a vector to manually specify break points.
same_lim

T/F. If x is a list of vectors, should all the plots be plotted in the same range? Default is True.
lim

Manually specify plotting range in the form of c(0, 10).
xaxt

On/Off for xaxis text
yaxt

On/Off for yaxis text
ann

On/Off for annotations (titles and axis titles)
col

Color for the fill of the histogram bar/boxplot box.
border

Color for the border.
dir

Directory of where the images will be saved.
file

File name. If not provided, a random name will be used
file_type

Graphic device. Can be character (e.g., "pdf") or a graphics device function (grDevices::pdf). This defaults to "pdf" if the rendering is in LaTeX and "svg" otherwise. for HTML output
...

extra parameters sending to hist()

Setup image path, size, etc

Description

Users can directly provide image file path to column spec. However, if you need to specify the size of the image, you will need this function.

Usage

spec_image(path, width, height, res = 300, svg_text = NULL)

Arguments

path

file path(s)
width

image width in pixel
height

image height in pixel
res

image resolution.
svg_text

If you have the raw text for SVG. Put them here

Helper functions to generate inline sparklines

Description

These functions helps you quickly generate sets of sparkline style plots using base R plotting system. Currently, we support histogram, boxplot, line, scatter and pointrange plots. You can use them together with column_spec to generate inline plot in tables. By default, this function will save images in a folder called "kableExtra" and return the address of the file.

Usage

spec_plot(
  x,
  y = NULL,
  width = 200,
  height = 50,
  res = 300,
  same_lim = TRUE,
  xlim = NULL,
  ylim = NULL,
  xaxt = "n",
  yaxt = "n",
  ann = FALSE,
  col = "lightgray",
  border = NULL,
  frame.plot = FALSE,
  lwd = 2,
  pch = ".",
  cex = 2,
  type = "l",
  polymin = NA,
  minmax = list(pch = ".", cex = cex, col = "red"),
  min = minmax,
  max = minmax,
  dir = if (is_latex()) rmd_files_dir() else tempdir(),
  file = NULL,
  file_type = if (is_latex()) "pdf" else svglite::svglite,
  ...
)

Arguments

x, y

Vector of values or List of vectors of values. y is optional.
width

The width of the plot in pixel
height

The height of the plot in pixel
res

The resolution of the plot. Default is 300.
same_lim

T/F. If x is a list of vectors, should all the plots be plotted in the same range? Default is True.
xlim, ylim

Manually specify plotting range in the form of c(0, 10).
xaxt

On/Off for xaxis text
yaxt

On/Off for yaxis text
ann

On/Off for annotations (titles and axis titles)
col

Color for the fill of the histogram bar/boxplot box.
border

Color for the border.
frame.plot

On/Off for surrounding box (spec_plot only). Default is False.
lwd

Line width for spec_plot; within spec_plot, the minmax argument defaults to use this value for cex for points. Default is 2.
pch, cex

Shape and size for points (if type is other than "l").
type

Passed to plot, often one of "l", "p", or "b", see graphics::plot.default() for more details. Ignored when 'polymin' is not 'NA'.
polymin

Special argument that converts a "line" to a polygon, where the flat portion is this value, and the other side of the polygon is the 'y' value ('x' if no 'y' provided). If 'NA' (the default), then this is ignored; otherwise if this is numeric then a polygon is created (and 'type' is ignored). Note that if 'polymin' is in the middle of the 'y' values, it will generate up/down polygons around this value.
minmax, min, max

Arguments passed to points to highlight minimum and maximum values in spec_plot. If min or max are NULL, they default to the value of minmax. Set to an empty list() to disable.
dir

Directory of where the images will be saved.
file

File name. If not provided, a random name will be used
file_type

Graphic device. Can be character (e.g., "pdf") or a graphics device function (grDevices::pdf). This defaults to "pdf" if the rendering is in LaTeX and "svg" otherwise.
...

extra parameters passing to plot

Helper functions to generate inline sparklines

Description

These functions helps you quickly generate sets of sparkline style plots using base R plotting system. Currently, we support histogram, boxplot, line, scatter and pointrange plots. You can use them together with column_spec to generate inline plot in tables. By default, this function will save images in a folder called "kableExtra" and return the address of the file.

Usage

spec_pointrange(
  x,
  xmin,
  xmax,
  vline = NULL,
  width = 200,
  height = 50,
  res = 300,
  same_lim = TRUE,
  lim = NULL,
  xaxt = "n",
  yaxt = "n",
  ann = FALSE,
  col = "red",
  line_col = "black",
  cex = 0.3,
  frame.plot = FALSE,
  dir = if (is_latex()) rmd_files_dir() else tempdir(),
  file = NULL,
  file_type = if (is_latex()) "pdf" else svglite::svglite,
  ...
)

Arguments

x, xmin, xmax

A scalar value or List of scalar values for dot, left and right errorbar.
vline

A scalar value for where to draw a vertical line.
width

The width of the plot in pixel
height

The height of the plot in pixel
res

The resolution of the plot. Default is 300.
same_lim

T/F. If x is a list of vectors, should all the plots be plotted in the same range? Default is True.
lim

Manually specify plotting range in the form of c(0, 10).
xaxt

On/Off for xaxis text
yaxt

On/Off for yaxis text
ann

On/Off for annotations (titles and axis titles)
col

Color for mean dot.
line_col

Color for the line and the error bar.
cex

size of the mean dot and error bar size.
frame.plot

T/F for whether to plot the plot frames.
dir

Directory of where the images will be saved.
file

File name. If not provided, a random name will be used
file_type

Graphic device. Can be character (e.g., "pdf") or a graphics device function (grDevices::pdf). This defaults to "pdf" if the rendering is in LaTeX and "svg" otherwise. for HTML output
...

extra parameters sending to hist()

Setup bootstrap popover

Description

Setup bootstrap popover

Usage

spec_popover(
  content = NULL,
  title = NULL,
  trigger = "hover",
  position = "right"
)

Arguments

content

content for pop-over message
title

title for pop-over message.
trigger

Controls how the pop-over message should be triggered. Possible values include hover (default), click, focus and manual.
position

How the tooltip should be positioned. Possible values are right(default), top, bottom, left & auto.

Setup bootstrap tooltip

Description

Setup bootstrap tooltip

Usage

spec_tooltip(title, position = "right")

Arguments

title

text for hovering message
position

How the tooltip should be positioned. Possible values are right(default), top, bottom, left & auto.

Load a LaTeX package

Description

Load a LaTeX package using R code. Just like ⁠\\usepackage{}⁠ in LaTeX

Usage

usepackage_latex(name, options = NULL)

Arguments

name

The LaTeX package name
options

The LaTeX options for the package

Examples

usepackage_latex("xcolor")

Convert XML back to kable

Description

Convert XML back to kable

Usage

xml_as_kable(x)

Arguments

x

XML table object

Convert xtable to a kable object

Description

This function allow users to turn an xtable object into a kable so they can use most of kableExtra's functions with their xtable code without making too many changes. Note that although I tested many cases and it seems to work, this function may not be functional in some other cases. I'm not a regular xtable user and can only provide very limited support for this function.

You should use this table in the same way as print.xtable. All the options you provided to this function will be sent to print.xtable. Instead of printing out the result, this function will return the LaTeX or HTML as text and a kable object.

Usage

xtable2kable(x, ...)

Arguments

x

an xtable object
...

options for print.xtable

Examples

## Not run: 
library(xtable)
xtable(mtcars) %>%
  xtable2kable(booktabs = TRUE) %>%
  kable_styling(latex_options = "striped")

## End(Not run)