decorate_dend: Decorate the heatmap dendrogram

Description

Decorate the heatmap dendrogram

Usage

decorate_dend(heatmap, code, slice = 1, which = c("column", "row"))

Arguments

heatmap

name of the heatmap

code

code that adds graphics in the selected heatmap body

slice

index of row slices in the heatmap

which

on rows or on columns?

Value

This function returns no value.

Details

There is a viewport for each dendrogram in the heatmap. This function contructs the name of the viewport, goes to the viewport by seekViewport and applies code to that viewport.

If you know the number of leaves in the dendrogram, it is simple to calculate the position of every leave in the dendrogram. E.g., for the column dendrogram, the i^th leave is located at:

# assume nc is the number of columns unit((i-0.5)/nc, "npc")

Examples

Run this code

set.seed(123)
Heatmap(matrix(rnorm(100), 10), name = "mat", km = 2)
decorate_dend("mat", {
    grid.rect(gp = gpar(fill = "#FF000080"))
}, which = "row", slice = 2)