How to setup step colorbar in matlab? -


i want change default color bar (jet color) generated matlab, step of color (just figure below). how that?

here's code

[hc hc] = contourf(interp2(sal,2,'spline'),[0:0.5:5]); set(hc,'linestyle','none','ytick',0:4); colorbar;

enter image description here

if looking reduce number of colors in contour plot , colorbar can set new colormap reduce color set. 

%get 10 colors jet numcolors = 10; colormap(jet(numcolors))   data = peaks; contourf(data) % optionally can set yticks in conjunction number of items in colormap line colorbar('ytick',linspace(min(data(:)),max(data(:)),numcolors+1))

enter image description here

edit: if want more control on contour lines drawn use function in form countourf(data,v) v monotonically increasing vector of desired contour levels. example:

contourf(data,linspace(-7,8,numcolors)) c = colorbar('ytick',linspace(-7,8,numcolors+1));

the draw 10 contour lines @ -7, -5.33, -3.66 ... 8. replace -7 , 8 whatever wish ex. min/max of data or whatever makes sense application


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