MATLAB: How to set the max and min value of the colorbar to be displayed on a Heatmap on Matlab 2015

Question

Hi, i need something similar. I used HeatMap function ad i obtained the two charts in attachment. The max values for the two charts are 1 an 0.857. On the two charts the maxi values (1 and 0.857) have the same color green. I need to rescale the second chart to the maximum value 1 in order to obtain the same colours for the same values in the two charts.

Answer 1

You're using the older HeatMap from the bioinformatics toolbox.

Instead, use heatmap which supports caxis().

If you have a good reason to continue using HeatMap instead, follow this demo to gain access to the axis handle and apply caxis.

HeatMap(magic(9));
ax = findall(0,'Type','Axes','Tag','HeatMapAxes'); 
caxis(ax, [20,30])

Add a colorbar,

colorbar(ax)

Note other alternatives to heatmap/HeatMap that are supported by older releases of Matlab.