## Usage

rtf_colheader(
tbl,
col_rel_width = NULL,
border_left = "single",
border_right = "single",
border_top = "single",
border_bottom = "",
border_color_left = NULL,
border_color_right = NULL,
border_color_top = NULL,
border_color_bottom = NULL,
border_width = 15,
cell_height = 0.15,
cell_justification = "c",
cell_vertical_justification = "bottom",
cell_nrow = NULL,
text_font = 1,
text_format = NULL,
text_font_size = 9,
text_color = NULL,
text_background_color = NULL,
text_justification = "c",
text_indent_first = 0,
text_indent_left = 0,
text_indent_right = 0,
text_space = 1,
text_space_before = 15,
text_space_after = 15,
text_convert = TRUE
)

## Arguments

tbl

A data frame.

A character string that uses " | " to separate column names. Default is NULL for a blank column header.

col_rel_width

A Column relative width in a vector e.g. c(2,1,1) refers to 2:1:1. Default is NULL for equal column width.

border_left

Left border type. To vary left border by column, use character vector with length of vector equal to number of columns displayed e.g. c("single","single","single"). All possible input can be found in r2rtf:::border_type()$name. border_right Right border type. To vary right border by column, use character vector with length of vector equal to number of columns displayed e.g. c("single","single","single"). All possible input can be found in r2rtf:::border_type()$name.

border_top

Top border type. To vary top border by column, use character vector with length of vector equal to number of columns displayed e.g. c("single","single","single"). If it is the first row in a table for this page, the top border is set to "double" otherwise the border is set to "single". All possible input can be found in r2rtf:::border_type()$name. border_bottom Bottom border type. To vary bottom border by column, use character vector with length of vector equal to number of columns displayed e.g. c("single","single","single"). All possible input can be found in r2rtf:::border_type()$name.

border_color_left

Left border color type. Default is NULL for black. To vary left border color by column, use character vector with length of vector equal to number of columns displayed e.g. c("white","red","blue"). All possible input can be found in grDevices::colors().

border_color_right

Right border color type. Default is NULL for black. To vary right border color by column, use character vector with length of vector equal to number of columns displayed e.g. c("white","red","blue"). All possible input can be found in grDevices::colors().

border_color_top

Top border color type. Default is NULL for black. To vary top border color by column, use character vector with length of vector equal to number of columns displayed e.g. c("white","red","blue"). All possible input can be found in grDevices::colors().

border_color_bottom

Bottom border color type. Default is NULL for black. To vary bottom border color by column, use character vector with length of vector equal to number of columns displayed e.g. c("white","red","blue"). All possible input can be found in grDevices::colors().

border_width

Border width in twips. Default is 15 for 0.0104 inch.

cell_height

Cell height in inches. Default is 0.15 for 0.15 inch.

cell_justification

Justification type for cell. All possible input can be found in r2rtf:::justification()$type. cell_vertical_justification Vertical justification type for cell. All possible input can be found in r2rtf:::vertical_justification()$type.

cell_nrow

Number of rows required in each cell.

text_font

Text font type. Default is 1 for Times New Roman. To vary text font type by column, use numeric vector with length of vector equal to number of columns displayed e.g. c(1,2,3).All possible input can be found in r2rtf:::font_type()$type. text_format Text format type. Default is NULL for normal. Combination of format type are permitted as input for e.g. "ub" for bold and underlined text. To vary text format by column, use character vector with length of vector equal to number of columns displayed e.g. c("i","u","ib"). All possible input can be found in r2rtf:::font_format()$type.

text_font_size

Text font size. To vary text font size by column, use numeric vector with length of vector equal to number of columns displayed e.g. c(9,20,40).

text_color

Text color type. Default is NULL for black. To vary text color by column, use character vector with length of vector equal to number of columns displayed e.g. c("white","red","blue"). All possible input can be found in grDevices::colors().

text_background_color

Text background color type. Default is NULL for white. To vary text color by column, use character vector with length of vector equal to number of columns displayed e.g. c("white","red","blue"). All possible input can be found in grDevices::colors().

text_justification

Justification type for text. Default is "c" for center justification. To vary text justification by column, use character vector with length of vector equal to number of columns displayed e.g. c("c","l","r"). All possible input can be found in r2rtf:::justification()\$type.

text_indent_first

A value of text indent in first line. The unit is twip.

text_indent_left

A value of text left indent. The unit is twip.

text_indent_right

A value of text right indent. The unit is twip.

text_space

Line space between paragraph in twips. Default is 0.

text_space_before

Line space before a paragraph in twips.

text_space_after

Line space after a paragraph in twips.

text_convert

A logical value to convert special characters.

## Value

The same data frame tbl with additional attributes for table column header.

## Specification

The contents of this section are shown in PDF user manual only.

## Examples

library(dplyr) # required to run examples
data(r2rtf_tbl1)
r2rtf_tbl1 %>%