Exclude some values from the heatmap

Hey guys!!!

I want to exclude the main diagonal values from the following heatmap, does anyone know how to take it?

ps. I especifically would like to let white the main diagonal, is it possible?

Thanks!!

[Alan Stevens]

Have you tried setting those values to NaN?

Answer 1

[KSSV]

Let M be your matrix of size n*n. To replace diagonal values with NaN:

M = rand(11) ; 
M(1:(n+1):end) = NaN ;