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Label 14 names in colorbar

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Jose
Jose 2012-11-5
Hi everyone!
I need to put 14 labels in a colorbar in a surf. If I put 14 labels, only shows 7 labels (first 7).
The max number of labels I can put is 12, after that only put the half.
Can you help me?
Thanks!
  1 个评论
Jan
Jan 2012-11-5
编辑：Jan 2012-11-5
It is not clear, what code produces this problem. It would be helpful to create an answer, if you post the relevant part of your program to reduce the need to guess what "if I put 14 labels" exactly means.

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回答（4 个）

Jan
Jan 2012-11-5
编辑：Jan 2012-11-5
Tiny modification of Image Analysts code:
numberOfColors = 14;
myColorMap = rand(numberOfColors,3);
colormap(myColorMap);
for c = 1:numberOfColors % Make tick mark labels.
ca{c} = sprintf('Color #%d', c);
end
colorbar('YTickLabel', ca, 'YTick', 1.5:numberOfColors+0.5); % <== Changes
The num,ber of TickLabels must equal the number of Ticks.
  1 个评论
Image Analyst
Image Analyst 2012-11-5
Ah, so that's the trick! Thanks. I had thought it would just kind of uniformly distribute the labels, but a careful reading of the help shows you are right: " To substitute strings for numbers along a colorbar, you define a label for each tick location." And it looks like the very bottom of the colorbar is 1 and the bottom (not top) of the top color (#14 in our example) is 14, so that's why you had to add 0.5 to make the label be in the middle of each colored panel in the colorbar.

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Image Analyst
Image Analyst 2012-11-5
编辑：Image Analyst 2012-11-5
I can reproduce what you say, but I don't know how to solve it. I wasn't able to solve it in 5 minutes. I post my code here in case others want to take a shot at it:
numberOfColors = 14;
myColorMap = rand(numberOfColors,3);
colormap(myColorMap);
for c = 1 : numberOfColors % Make tick mark labels.
ca{c} = sprintf('Color #%d', c);
end
colorbar('YTickLabel', ca);
What's even weirder is that it seems to "wrap around" if you give less than some number. try putting in 4 or 6 into my code for numberOfColors.
Jonathan Epperl
Jonathan Epperl 2012-11-5
Maybe I don't understand your question properly, but if I do, then you could do it like so:
surf(peaks)
c = colorbar;
set(c,'YTick',-6:8,'YTickLabel',num2str((-6:8)','%d'))
Now you got 15 labels on your colorbar, and since you have the handle of it, you can do all kinds of other stuff to it, too.
Jose
Jose 2012-11-6
thanks to all! :D

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