R - 热图，设置ColSideColors

Question

我可以使用palette()沿着热图的行和列设置颜色标签吗？ 我做一个随机4x4矩阵，绘制热图，并尝试设置侧面颜色：

m <- matrix(rnorm(16), 4, 4) 
c <- c(1,1,2,2) 
heatmap(m,ColSideColors=c) 

，我得到的错误：

"Error in heatmap(m, ColSideColors = c) : 
    'ColSideColors' must be a character vector of length ncol(x)" 

Answer 1

从?heatmap：

ColSideColors (optional) character vector of length ncol(x) containing the color names for a horizontal side bar that may be used to annotate the columns of x.

set.seed(42) 
m <- matrix(rnorm(16), 4, 4) 
xsidecols <- c("#cdcd0d", "#0dcdcd", "#cd0dcd", "grey") 
heatmap(m, ColSideColors = xsidecols)