MATLAB: Is it possible to make contour graph with log scale colorbar

colorbarcontourgraphics

So, basicaly it's all explained in the title. I would like to make contourf plot but in such a way that the colorbar is in log scale because I have quite a large range of values in my data.
I've read all the help on contour and contourf functions and colorbar but nothing useful can be found there.
Thank You in advance!

Best Answer

Sure just take the log() of the input matrix Z. I'm assuming your data are nonnegative.
   z = peaks;
   z = abs(z);
   contourf(log(z))
   colorbar
Or if you want it in "dB"
   contourf(10*log10(z))
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