How to replace certain cells in heatmap with "Not Detected"?

I am working on a heatmap and some of my data values are 0. Is there a way to replace these cells with "Not Detected"? Thanks!

Answer 1

[jonas]

Best you can do is probably to set all zeros to NaN and then add this line

set(gca,'missingdatalabel','not detected')

Zeros can be set to NaN by logical indexing. If A is your matrix with values:

A(A==0)=NaN