How can I reverse colormap in contourfm?

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Aleksandra
Aleksandra 2012-11-26
回答： Tony Azar 2022-6-1
I'd like to use the reverse of jet colormap in contourfm. contourfm seems to only accept standard string values for predefined colormaps.

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采纳的回答

Walter Roberson
Walter Roberson 2012-11-26
?? 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))
  2 个评论
M.Prasanna kumar
M.Prasanna kumar 2019-11-3
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
Tony Azar 2022-5-26
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"

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更多回答（1 个）

Tony Azar
Tony Azar 2022-6-1
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"

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