r - 使用 pheatmap 进行聚类后，如何在热图中获取列和行的新顺序

Question

我使用“pheatmap”包绘制热图，并与行和列聚集在一起。但是，由于某种原因，我需要获取热图中的行顺序和列顺序。有没有一种方便的方法来做到这一点？这是一个 pheatmap 的例子。

test = matrix(rnorm(200), 20, 10)
test[1:10, seq(1, 10, 2)] = test[1:10, seq(1, 10, 2)] + 3
test[11:20, seq(2, 10, 2)] = test[11:20, seq(2, 10, 2)] + 2
test[15:20, seq(2, 10, 2)] = test[15:20, seq(2, 10, 2)] + 4
colnames(test) = paste("Test", 1:10, sep = "")
rownames(test) = paste("Gene", 1:20, sep = "")

pheatmap(test)

Answer 1

我自己得到答案。

test = matrix(rnorm(200), 20, 10)
test[1:10, seq(1, 10, 2)] = test[1:10, seq(1, 10, 2)] + 3
test[11:20, seq(2, 10, 2)] = test[11:20, seq(2, 10, 2)] + 2
test[15:20, seq(2, 10, 2)] = test[15:20, seq(2, 10, 2)] + 4
colnames(test) = paste("Test", 1:10, sep = "")
rownames(test) = paste("Gene", 1:20, sep = "")

myheatmap <- pheatmap(test);
myheatmap$tree_row$order
#1  7  3  5  8  2 10  9  4  6 13 12 11 14 17 20 16 18 15 19