a specific colormap for filled contour plot

Hi All,

I was using contourf for filled contour plotting. And I've added standard colorbar to display the color. Then I've got comments from client that they would like the contour to be plotted in a more specific way - they would like to use white for zero, and then the color should go from white to red as number gets more negative, and white to blue as the number gets more positive.

Is it something can be done in Matlab?

Thank you.

Answer 1

[per isakson]

Yes, you can make a special colormap to accomplish that

• see colormapeditor
• there are many different colormaps in the File Exchange
• and the one you need bluewhitered by Nathan Childress

[Silin]

Thank you. Is there a function that do the opposite as bluewhitered? Meaning put the negative as red and positive as blue?

Thanks again.

[per isakson]

Try something like

    redwhiteblue = flipud( bluewhitered );

Answer 2

[Kelly Kearney]

I like usercolormap to create quick, reusable colormaps.

Answer 3

[Silin]

Thanks a lot! I was able to use bluewhitered and modify it a bit to change it from redwhiteblue.

Thanks again for your help!