How can I get a colormap that has the colors that varies smoothly from blue, through white, to red?

I want to use a colormap for my contour plot that looks like the built-in colormap 'Jet', but I do not want the scale to contain the color green, but white instead. Can somebody help me?

Answer 1

[Kevin Claytor]

There's a programmatic way of doing it, but this is the GUI point and click method; Right click on the colorbar -> Open Colormap Editor The colorbar will appear as a horizontal stripe with little flags below it. Double click the green flag. This brings up a color selection window, pick white and go OK.

To do this automatically in the future you can save the colormap with;

myColormap = colormap;
save('colormapsavefile.mat','myColormap');

To apply;

load('colormapsavefile.mat');
colormap(myColormap);

With some tweaking you can set the default colormap using this method and the startup.m file.

[SiljeH]

Perfect, thank you very much! :)

[DGM]

See also:

https://www.mathworks.com/matlabcentral/fileexchange/67415-whitish-jet-colormap

Having a colormap generator function is convenient and flexible.