How to set common colorbar for multiplots?

Hi all,

I am using subplots to plot multiple contour plots in a single figure using for loop and using colorbar with 'Position' but it doesn't give the common values for all the plots. I have tried different solution which was given to other Matlab users but none worked.

fig=figure(1)
clf
for i=1:24
subplot(6,4,i)
contourf(x,y,z)
end
h=axes(fig,'visible','off'); 
h.Title.Visible='on';
h.XLabel.Visible='on';
h.YLabel.Visible='on';
ylabel(h,'yaxis','FontWeight','bold');
xlabel(h,'xaxis','FontWeight','bold');
title(h,'title');
colormap(jet)
c=colorbar;
c.Position = [0.93 0.168 0.022 0.7];

Can you help me with this problem?

Thanks in advance!

Answer 1

[Robert U]

Hi UTKARSH VERMA,

have a look at caxis():

[x, y] = meshgrid(0:0.1:1,0:0.1:1);
z = rand(11,11,24);

minColorLimit = min(min(min(z)));                   % determine colorbar limits from data
maxColorLimit = 24*max(max(max(z)));

fig=figure(1);
for i=1:24
    sph{i} = subplot(6,4,i,'Parent',fig);
    contourf(sph{i},x,y,i.*z(:,:,i))                % changes due to illustration purposes
    caxis(sph{i},[minColorLimit,maxColorLimit]);    % set colorbar limits
end
h = axes(fig,'visible','off'); 
h.Title.Visible = 'on';
h.XLabel.Visible = 'on';
h.YLabel.Visible = 'on';
ylabel(h,'yaxis','FontWeight','bold');
xlabel(h,'xaxis','FontWeight','bold');
title(h,'title');

c = colorbar(h,'Position',[0.93 0.168 0.022 0.7]);  % attach colorbar to h
colormap(c,'jet')
caxis(h,[minColorLimit,maxColorLimit]);             % set colorbar limits

Kind regards,

Robert

[UTKARSH VERMA]

Thanks Robert!!

It's working perfectly.

[Arnav Gupta]

Hey robert I executed this code but noticed that once a single colorbar comes for all subplots no matter how much i change its limits , there is no change in the subplots. Is it becuase the subplots limits are already specified in for loop and outer colorbar limits has no relation with these subplots??