row order in `draw(ht1+ht2)`

[blueskypie]

In the following code from docs

ht1 = Heatmap(mat1, name = "rnorm")
ht2 = Heatmap(mat2, name = "runif")
ht3 = Heatmap(le, name = "letters")

let mat0=cbind(mat1,mat2,le), is the row clustering of draw(ht1 + ht2 + ht3) computed on mat0?

How to make the row clustering be computed on mat1 only? mat2 and le just use the same row order from the row clustering of mat1.

[jokergoo]

For the following

ht1 = Heatmap(mat1, name = "rnorm")
ht2 = Heatmap(mat2, name = "runif")
ht3 = Heatmap(le, name = "letters")
draw(ht1 + ht2 + ht3)

The row order is determined by the first numeric matrix which is "rnorm".

If you want the row order from the combined matrix:

mat0=cbind(mat1,mat2,le)
row_order = hclust(dist(mat0))
ht1 = Heatmap(mat1, name = "rnorm", row_order = row_order)
ht2 = Heatmap(mat2, name = "runif")
ht3 = Heatmap(le, name = "letters")
draw(ht1 + ht2 + ht3)

[blueskypie]

So, if the row_order is set in Heatmap, draw won't hclust again?

[jokergoo]

Yes, Heatmap() is a constructor function, so all settings are there.