log sacle colorbar: how to set ticks?-CodePudding

I want to set the ticks of the colorbar to be in log scale, with simple readable ticks: 2 3 4 5 6 7 8 9 10 20 30 (and not just "10^0", "10^1");

for example I do:

x = linspace(0,0.9);
y=logspace(-1,1);
[X,Y] = meshgrid(x,y);
Z = 220 *sqrt((1-X).*Y); %just random function(x,y)
[M,c]= contourf(X,Y,Z,100);

c.LineColor = 'none';

set(gca,'ColorScale','log')

cl=colorbar;
ylabel(cl, 'color')
cl.Ticks=[ 2 3 4 5 6 7 8 9 10 20 30];
cl.TickLabels = num2cell([ 2 3 4 5 6 7 8 9 10 20 30]);

It doesn't work that way. How to do it?

CodePudding user response：

Your code works well and as expected. If you check your colorbar, the lower limit value is 22, and therefore you only see the last label.

x = linspace(0,0.9);
y=logspace(-1,1);
[X,Y] = meshgrid(x,y);
Z = 220 *sqrt((1-X).*Y); %just random function(x,y)
[M,c]= contourf(X,Y,Z,100);
c.LineColor = 'none';
set(gca,'ColorScale','log')
cl=colorbar;
ylabel(cl, 'color')

cl.Limits=[2 cl.Limits(2)]      % change the range

cl.Ticks=[ 2 3 4 5 6 7 8 9 10 20 30];
cl.TickLabels = num2cell([ 2 3 4 5 6 7 8 9 10 20 30]);