在R中提取热图的特定成员

Question

I generated a heatmap based on a 4500 row x 400 col matrix m:

hm<-heatmap(m, na.rm=TRUE, col=bluered(256))

So how do I see members of specific clusters? I read a bit and know that I have to use 'cutree()' but I am still not sure how to properly implement it.

Thanks.

Answer 1

hm<-heatmap.2(m, na.rm=TRUE)
clstrs <- cutree(as.hclust(hm$rowDendrogram), 1:dim(m)[1])

And depending on how many clusters you want, you select the right column. Thus if you want 7 clusters:

clstrs[, 7]

Will tell you in which cluster each element belongs.