Is it possible to eliminate a color range from certain colormap?

I am using colormap hsv in my plots, but I do not want the upper red color in the colorbar because it can be confusing with the lower red. Can I manually edit this color range?

Thanks

Answer 1

[KSSV]

Z = peaks(100) ; 
figure(1)
pcolor(Z)
cmap = hsv ;
colormap(cmap)
% Remove red 
idx = cmap(:,1)==1 ; 
cmap(idx,:) = [] ;
figure
pcolor(Z) 
colormap(cmap)

Answer 2

[DGM]

Old, I know ...

If you want to break the circularity of hsv(), you can do so by doing the interpolation yourself:

z = peaks(100);

ncolors = 64;
cm = hsv(6); % the minimal set of primaries and secondaries
cm = interp1(1:6,cm,linspace(1,6,ncolors));

imagesc(z);
colormap(cm)
colorbar