How to color a range of bins in histogram?

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Yan Liu
Yan Liu 2016-2-12
评论： Roman 2020-2-21
Dear scholars,
I have created a simple histogram.
x = rand(10000,1); histogram(x);
I want to color the bins after 0.5 red but I do not know how to do that. Thank you so much for your help.
Pete

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回答（1 个）

Mike Garrity
Mike Garrity 2016-2-12
Usually the most robust way is to create two separate histogram objects:
x = rand(10000,1);
mask = x<.5;
bin_edges = 0:.1:1;
histogram(x(mask),bin_edges);
hold on
histogram(x(~mask),bin_edges,'FaceColor','red');
hold off
Then you can set any properties you like on each of the two objects.
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Image Analyst
Image Analyst 2016-2-12
Please go ahead and "Accept this answer" so we know it's solved.
Roman
Roman 2020-2-21
How can I do that, when I do not know the binedges in advance. I trid something like:
1.)
mask=cdw(:,2:j)>=100;
hx=histogram(a2,cdw(mask),'Orientation','horizontal','Normalization','probability','Parent',a2,'FaceColor','green');
hold on
hx=histogram(a2,cdw(~mask),'Orientation','horizontal','Normalization','probability','Parent',a2,'FaceColor','red');
hold off
2.)
mask=cdw(:,2:j)>=100;
hx=histogram(a2,cdw(mask),'Orientation','horizontal','Normalization','probability','Parent',a2,'FaceColor','green');
bin_Edges=hx.BinEdges;
hold on
hx=histogram(a2,cdw(~mask),'Orientation','horizontal','Normalization','probability','Parent',a2,'BinEdges',bin_Edges,'FaceColor','red');
hold off
But both do not work properly; around 100 I get an intersection part of bars where colors are on top of each other.
Thanks

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