Hi Ilyass,
You can change the 'ColorLimits' property of the HeatmapChart so that all the values of 'cdata' that are equal to and above the upper limit will have the same color. To specify this color, you can append its RGB values as a row vector to the Colormap of your choice.
For example, have a look at this example code and its output, where the Colormap chosen was 'autumn' and all the values equal to and greater than 60 are highlighted in green :
cdata = [45 60 32; 43 54 76; 32 94 68; 23 95 58];
xvalues = {'Small','Medium','Large'};
yvalues = {'Green','Red','Blue','Gray'};
mymap = [autumn; 0 1 0]; % Green - [0 1 0]
h = heatmap(xvalues,yvalues,cdata,'Colormap',mymap);
h.ColorLimits = [20 60];
h.Title = 'T-Shirt Orders';
h.XLabel = 'Sizes';
h.YLabel = 'Colors';
Output:
Hope this helps!
