How not to display zero entries in heatmap?

I have generated following heatmap

Is it possible to make cells with zero entries just to display the colour without the value?

rawdata = readmatrix('Wave data_Galle_NARA.xlsx');
Hs_edges = 0.5:0.5:4.5;
Tp_edges = 5:1:22;
[N,Xedges,Yedges,binX,binY] = histcounts2(rawdata(:,2),rawdata(:,1),Tp_edges,Hs_edges,'Normalization','probability');
h = heatmap(N')

Thank you!

[AndresVar]

i don't think it's possible. But what about using the missing property

clear; 
close all;

rawdata = readmatrix('Wave data_Galle_NARA.xlsx');
Hs_edges = 0.5:0.5:4.5;
Tp_edges = 5:1:22;
[N,Xedges,Yedges,binX,binY] = histcounts2(rawdata(:,2),rawdata(:,1),Tp_edges,Hs_edges,'Normalization','probability');


N(N==0) = nan;    
h = heatmap(N(1:5,1:5)',MissingDataLabel='no data',MissingDataColor=[1 0.9 0.9]);

[Vidura Vishvanath]

Thank you, This will do!