Heatmap with specified color ranges?

I would like to generate a heat map for my data such that values =<3.00 are white, and values >3.00 up to the max (typically the max values can be from 10.00 to 30.00) are graded from white to red. For example, in Excel, the conditional formatting rule is:

How do I do the eqjuivalent for my matrix of data, using Matlab's heatmapping?

Thanks!

Answer 1

[dpb]

Whether this does precisely what you're looking for or not, I dunno...but might be a starting point.

Nothing like that built in to any of the MATLAB colormap functionality.

<FEX 4775 Threshold Color Range in HEATMAP>

[Stephen]

OK, thanks! Let me play with this and see how it works...

[Stephen]

Wait! I just think I solved my own problem with a SIMPLE solution. Namely, if I set the color axis to a threshold value, e.g. 3, and select a max value that will include the peak values in my array, this does the same thing as the above Excel conditioning format! That is:

caxis([3 10]);

[dpb]

Kewl. I never did follow the caxis stuff all that much...