Logarithmic scale for colorbar

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Tom
Tom 2015-4-15
评论： Walter Roberson 2020-4-27
I sometimes require a plot which has a colorbar with a log scale. Previously I did this by setting the 'yscale' property of the underlying colorbar axes, but this no longer works with the new graphics system. Is there a workaround for the new system?

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采纳的回答

Jonathan Campelli
Jonathan Campelli 2015-4-15
Hello Tom,
My script plots sample data in logscale using "countourf", and both "YTick" and "YTickLabel" are set in "colorbar" on the last line:
Data=magic(100);
c=[1 10/3 10 100/3 100 1000/3 1000 10000/3 10000];
contourf(log(Data(:,:)),log(c));
colormap(bone); %Color palate named "bone"
caxis(log([c(1) c(length(c))]));
colorbar('FontSize',11,'YTick',log(c),'YTickLabel',c);
If this code does not meet your needs, let me know, and I will develop a more appropriate solution,
Best regards,
Jonathan Campelli
  2 个评论
Troy Dion
Troy Dion 2017-8-3
Is there a way to make this work with scatter3?
Troy
Bo Wang
Bo Wang 2020-4-27
its a really nice answer to me , thanks !

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更多回答（1 个）

Xiaolong
Xiaolong 2020-3-26
set(gca,'colorscale','log')
  1 个评论
Walter Roberson
Walter Roberson 2020-4-27
Note: that was not available at the time the question was originally asked.

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