decorate_dend: Decorate the heatmap dendrogram
In eilslabs/ComplexHeatmap: Making Complex Heatmaps

Description Usage Arguments Details Value Author(s) Examples

Decorate the heatmap dendrogram

1 2	decorate_dend(heatmap, code, slice = 1, which = c("column", "row"), envir = new.env(parent = parent.frame()))

`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?
`envir`	where to look for variables inside `code`

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:

1 2	# assume nc is the number of columns unit((i-0.5)/nc, "npc")

This function returns no value.

Zuguang Gu <z.gu@dkfz.de>

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)