\name{anno_boxplot}
 \alias{anno_boxplot}
 \title{

 Using boxplot as annotation

 }
 \description{

 Using boxplot as annotation

 }
 \usage{

 anno_boxplot(x, which = c("column", "row"), border = TRUE,

     gp = gpar(fill = "#CCCCCC"), ylim = NULL, outline = TRUE,

     pch = 16, size = unit(2, "mm"), axis = FALSE, axis_side = NULL,

     axis_gp = gpar(fontsize = 8), axis_direction = c("normal", "reverse"))
 }

 \arguments{
 

   \item{x}{a matrix or a list. If \code{x} is a matrix and if \code{which} is \code{column}, statistics for boxplot is calculated by columns, if \code{which} is \code{row}, the calculation is by rows.}

   \item{which}{is the annotation a column annotation or a row annotation?}

   \item{border}{whether show border of the annotation compoment}

   \item{gp}{graphic parameters}

   \item{ylim}{data ranges.}

   \item{outline}{whether draw outliers}

   \item{pch}{point type}
   \item{size}{point size}

   \item{axis}{whether add axis}

   \item{axis_side}{if it is placed as column annotation, value can only be "left" or "right". If it is placed as row annotation, value can only be "bottom" or "top".}

   \item{axis_gp}{graphic parameters for axis}

   \item{axis_direction}{if the annotation is row annotation, should the axis be from left to right (default) or follow the reversed direction?}

 }
 \value{

 A graphic function which can be set in \code{\link{HeatmapAnnotation}} constructor method.

 }
 \author{

 Zuguang Gu <z.gu@dkfz.de>

 }
 \examples{
 mat = matrix(rnorm(32), nrow = 4)
 f = anno_boxplot(mat)
 grid.newpage(); f(1:8)
 
 f = anno_boxplot(mat, which = "row")
 grid.newpage(); f(1:4)
 
 lt = lapply(1:4, function(i) rnorm(8))
 f = anno_boxplot(lt)

 grid.newpage(); f(1:4)

 }