table_options: Set or query options for the table formatting.

Description

These functions set or query options for table formatting in LaTeX or HTML output.

Usage

table_options(...)
booktabs(...)
htmloptions(head=TRUE, table=TRUE, pad=FALSE, 
            ...)

Value

table_options() and booktabs() return the previous settings.

htmloptions() returns a list of settings without changing the defaults.

Arguments

head: logical; enables all of the HTML header options
table: logical; enables output of all parts of the table itself
pad: logical; enables all of the HTML padding options
...: Any of the options listed in the Details below.

Details

The table_options() function sets a number of options that control formatting. Currently the options that affect both LaTeX and HTML output are:

justification = "c": Default justification for the data columns in the table.
rowlabeljustification = "l": Default justification for row labels.
doBegin, doHeader, doBody, doFooter, doEnd: These logical values (all defaults are TRUE) control the inclusion of specific parts of the output table.
knit_print = TRUE: Do auto formatting when printing in a knitr document.

These options are only used for LaTeX output:

tabular = "tabular": The LaTeX environment to use for the table. Other choices such as "longtable" might make sense.
toprule, midrule, bottomrule: The LaTeX macros to use for the lines in the table. By default they are all "\hline".
titlerule = NULL: The LaTeX macro to use to underline multicolumn titles. If NULL, no underlining is done.
latexleftpad, latexrightpad, latexminus, mathmode: These control formatting of numbers in the table. If TRUE (the default), blanks in R's formatting are converted to hard spaces in the LaTeX output, and negative signs are rendered properly. Generally this makes output look better, but the .tex input may be harder to read.

These options are only used for HTML output:

doHTMLheader, doCSS, doHTMLbody: These control output of the material at the top of an HTML page.
HTMLhead, CSS, HTMLbody: These are the default strings to output when the corresponding element is selected. If present, the string "CHARSET" will be replaced with the result of localeToCharset() in the HTMLhead. The string "#ID" will be replaced with "#" followed by the id argument to html.tabular (or removed if that is blank).
HTMLcaption: This is an optional HTML caption for the table. If NULL, no caption is emitted.
HTMLleftpad, HTMLrightpad, HTMLminus: These control formatting of numbers in the table. If TRUE, blanks in R's formatting are converted to hard spaces in the HTML output, and negative signs are rendered properly. Generally this makes output look better, but cut and paste from the table may include these special characters and not be recognized by other software. The default is FALSE.
HTMLattributes: This is a string to add to the "<table>" declaration at the top of the table. By default, the attributes are 'frame="hsides" rules="groups"'. These set horizontal rules on the top and bottom of the table and between the header, body, and footer (if present).
HTMLfooter: This is NULL for no footer, or HTML code to insert in the table. Note that in HTML the footer should be specified before the body of the table; html.tabular will do this if both are written in the same call.

These may be set persistently by calling table_options(), or just for the duration of the call by passing them in a list via latex(options=list( ... )). Additional ... arguments to latex are passed to format.

The booktabs() function sets the table_options() values to different defaults, suitable for use with the booktabs LaTeX package.

The htmloptions() function constructs a list suitable for the options argument to html.tabular, with grouping of options that rarely differ from each other.

Note that any LaTeX code can be used in the rule options; for example, see the longtable example in the vignette. Material to go above the headers goes into toprule, material between the headers and the body goes into midrule, and material at the bottom of the table goes into bottomrule.

Examples

Run this code

tab <- tabular( (Species + 1) ~ (n=1) + Format(digits=2)*
         (Sepal.Length + Sepal.Width)*(mean + sd), data=iris )
toLatex(tab)
save <- booktabs()
toLatex(tab)
table_options(save)

# \donttest{
f <- tempfile(fileext = ".html")
if (interactive())
  toHTML(tab, f, 
    options=htmloptions(HTMLcaption="Table of Iris Data",
                      pad = TRUE))
# }