Control colorbar in a plot

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antonio ferreira
antonio ferreira 2018-2-17
回答： antonio ferreira 2018-2-18
Dear all, I was wondering if anyone knows a way of controlling the colorbar of a plot? At the moment I have the following code: subplot(3,1,3); [cs2,h2]=contourf(xgrid,ygrid,U_40cm,10); hold on; clabel(cs2,h2); h2.LevelList = round(h2.LevelList, 2); set(gca, 'CLim', [-25 20]); xlabel('$y$ $(cm)$','interpreter','latex','Fontsize',14,'Fontname','Times'), ylabel('$z$ $(cm)$','interpreter','latex','Fontsize',14,'Fontname','Times'), %set(gca,'xtick',83:1:92,'Fontsize',16,'Fontname','Times'), %set(gca,'ytick',1:0.5:4,'Fontsize',16,'Fontname','Times'), axis([83 92 1.2 3.9]); colormap('jet')
In the colorbar, matlab is just presenting the values -20,0,20. Is there any way of forcing matlab to present instead -20,-10,0,10,20? I need this to make the appearance of this plot compatible with other plot. Thanks in advance.

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回答（2 个）

antonio ferreira
antonio ferreira 2018-2-17
Dear all, I was wondering if anyone knows a way of controlling the colorbar of a plot? At the moment I have the following code:
subplot(3,1,3);
[cs2,h2]=contourf(xgrid,ygrid,U_40cm,10); hold on;
clabel(cs2,h2);
h2.LevelList = round(h2.LevelList, 2);
set(gca, 'CLim', [-25 20]);
xlabel('$y$ $(cm)$','interpreter','latex','Fontsize',14,'Fontname','Times'),
ylabel('$z$ $(cm)$','interpreter','latex','Fontsize',14,'Fontname','Times'),
axis([83 92 1.2 3.9]);
colormap('jet')
title('ds = 40 cm')
In the colorbar, matlab is just presenting the values -20,0,20. Is there any way of forcing matlab to present instead -20,-10,0,10,20? I need this to make the appearance of this plot compatible with other plot. Thanks in advance.
antonio ferreira
antonio ferreira 2018-2-18
All, the following seems to answer my question (after invoking the colormap function):
cbh=colorbar;
cbh.TickLabels = num2cell([-20 -10 0 10 20]);

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