How can I reverse colormap in contourfm?

I'd like to use the reverse of jet colormap in contourfm. contourfm seems to only accept standard string values for predefined colormaps.

Answer 1

[Walter Roberson]

?? MATLAB's contourfm does not have a colormap argument at all, let alone a string.

If you want to reverse the colormap, just do it:

colormap(flipud(jet))

[M.Prasanna kumar]

is there a way to assign yellow color to blue and blue to yellow in an image ??

im using imagesc command

i have attached my image

[Tony Azar]

Here is an example on how to reverse colors:

C = [0 2 4 6; 8 10 12 14; 16 18 20 22];

imagesc(C), colormapeditor

once the editor is loaded, click on "Edit Size and Colorspace" then check "Reverse"

Answer 2

[Tony Azar]

Here is how you can reverse the "jet" colormap in contourfm.

This example is from :

https://www.mathworks.com/help/map/ref/contourfm.html?searchHighlight=contourfm&s_tid=srchtitle_contourfm_1

[N,R] = egm96geoid;

load coastlines

worldmap('world')

levels = -120:20:100;

contourfm(N,R,levels,'LineStyle','none')

geoshow(coastlat,coastlon,'Color','k')

contourcbar

colormap('jet')

colormapeditor

once the editor is loaded, click on "Edit Size and Colorspace" then check "Reverse"