% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/add_header_above.R
\name{add_header_above}
\alias{add_header_above}
\title{Add a header row on top of current header}
\usage{
add_header_above(kable_input, header = NULL)
}
\arguments{
\item{kable_input}{Output of `knitr::kable()` with `format` specified}

\item{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)`.}
}
\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. This function can work with
both `HTML` and `LaTeX` outputs
}
\examples{
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))

}