In a pcolor plot, how do I make values with 0 blank or set the color scheme to a set range?

Basically, I need to be able to set the the color scheme to a range so I can see certain values.

I have measurements that are about .1700, but they vary by about .001 and I want to see that variation. The problem is that I have 0 values (for formatting reasons) and they make it so I can't see the variation.

I would like to be able to set a range for the colors.

Red = max value

blue = min value -= 0

Answer 1

[Miro]

The easiest way to go is to turn all zeros into NaN's (not a number) like

Data(Data==0)=NaN;

Then they dont appear in the plot. otherwise you have to use the colormap editor (rightklick on the colormap -> colormapeditor). There you can shift the arrows and change the colors. Afterwards you can save the colormap by

Colmap = colormap;

and use the scheme again in another plot like

colormap(Colmap);

[Andrew]

That worked great thanks.

Is X(X==0) = NaN,

essentially

 a = length(X)

 for i = 1:a

   for j = 1:a

      if X(i,j) == 0

      X(i,j) == NaN

     end

    end

   end

[Miro]

yes, but it is generally faster.

[Andrew]

Yeah. I didn't know that function existed. That will make the rest of the program a lot faster.