Colorbar in colormap with labels

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erup eruo
erup eruo 2018 年 10 月 26 日
回答済み: erup eruo 2018 年 10 月 26 日
Hello,
I have this simple example where the colorbar is not working properly. For example, the color corresponding to 'j' is not shown wether the color coreesponding to 'h' (not present in the representing matrix) is.
labels = {'a','b','c','d','e','f','g','h','i','j','k','l'};
mtx = [2 5 4 5 6 3 2 5 2 2 2 4 6 7 9 10 9 5 9 7 10 2 3];
t = (0:1:length(mtx)-1)/5;
y = ones(1,length(t));
[C,ia,ic] = unique(mtx);
figure
colormap(jet(length(C)));
image(t,y,mtx); % or imagesc instead
yticklabels({});
colorbar('XTick',0:1:12,'TickLabels',labels,'Position',[0.95 0.1 0.01 0.5]);
Can anyone help me??
Tanks!!

採用された回答

jonas
jonas 2018 年 10 月 26 日
編集済み: jonas 2018 年 10 月 26 日
There range in your plotted values are 2-10, and the colorscale is per default scaled so that the maximum (10) and minimum (2) are the max and min values on your colormap. You need to force the colorbar to extend beyond these values.
labels = {'a','b','c','d','e','f','g','h','i','j','k','l'};
mtx = [2 5 4 5 6 3 2 5 2 2 2 4 6 7 9 10 9 5 9 7 10 2 3];
t = (0:1:length(mtx)-1)/5;
y = ones(1,length(t));
set(gca,'clim',[0 12])
figure
cmap=colormap(jet(numel(labels)));
image(t,y,mtx); % or imagesc instead
yticklabels({});
cb=colorbar('XTick',1.5:1:12.5,'TickLabels',labels,'Position',[0.95 0.1 0.01 0.5],'limits',[1 13]);

その他の回答 (3 件)

erup eruo
erup eruo 2018 年 10 月 26 日
That's right. But there is neither 12 nor 8 nor 11. With these limits, the labels don't correspond with the colors. Even though, 9 has the same colour than 10.
  2 件のコメント
jonas
jonas 2018 年 10 月 26 日
Come on.. don't accept your own "answer" that isn't even an answer.

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erup eruo
erup eruo 2018 年 10 月 26 日
Okey
thanks for your info
labels = {'a','b','c','d','e','f','g','h','i','j','k','l'};
mtx = [2 5 4 5 6 3 2 5 2 8 2 2 4 6 7 9 10 9 5 9 7 10 2 3 11 12];
t = (0:1:length(mtx)-1)/5;
y = ones(1,length(t));
figure
colormap(jet(numel(labels)));
image(t,y,mtx); yticklabels({});
colorbar('XTick',1.5:1:12.5,'TickLabels',labels,'Position',[0.95 0.1 0.01 0.5],'limits',[1 13]);
set(gca,'clim',[1 12]);
Fyi, this is how I wanted the final result.
THANK YOU VERY MUCH!!
  2 件のコメント
Image Analyst
Image Analyst 2018 年 10 月 26 日
Vote for it too, like I did.
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erup eruo
erup eruo 2018 年 10 月 26 日
I'm sorry. I made a mistake. Obviously your answer is the good one

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