rescale the colour range or squeez the colours

I have a color bar scale changing from 600 to 1020 based on the matrix values while only 2 colors of the range change from day to day. In other hand the most variations in my project belong to the range between 950 to 1025 or 1030. When I use caxis, the colorbar scale doesn't change and I see the range from 900 to 1030 for example which is correct but the pattern colour changes & goes to the real clour belonging to their own values. How can I see the same colour variations but for the new range. xlim and ylim doesn't work in this case.

Answer 1

[Chad Greene]

If you can give some example data that would help. But this might be the fix you're looking for. If you start with

colormap(jet(256))

That sets the colormap to a 256-level rainbow colormap. If you only want to show part of that rainbow you can do

mycolormap = jet(256); 
colormap(mycolormap(100:160,:))

to show levels 100 to 160 of the rainbow colormap.

I should clarify, I use the rainbow colormap only because it's a simple example that you can replicate on any version of Matlab. In general, it is a bad colormap. I recommend using Stephen Cobeldick's brewermap instead.

Answer 2

[SH]

this is what I get based on the real data

Answer 3

[SH]

and after using caxis ([900 1030]):

[SH]

But on the map again I want to see for example dark red for 1030 and dark blue for 900.