How to change the transparency of bars in a barseries plot?

4 次查看（过去 30 天）
Jorn
Jorn 2013-2-19
Hi,
Because I would like to plot 2 barseries on top of each other, I need to make the bars of 1 barserie a little bit transparant.
I have tried this using the Alpha function, but it returns an error:
Error using specgraph.barseries/set The name 'FaceAlpha' is not an accessible property for an instance of class 'barseries'.
Another solution that I found, but didnt work for me:
v1 = rand(81,1); c1 = [1 0 1]; H1=histfit(v1); set(H1(2),'Color',c1); set(H1(1),'FaceColor',c1); hpatch = get(H1(1),'children'); set(hpatch,'FaceAlpha',.25);
The transparency i not influenced by the code.
Any ideas on how I need to go about in this matter? I have Matlab 7.13 / R2011b.
Thanks,
Jorn

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回答（2 个）

José-Luis
José-Luis 2013-2-19
编辑：José-Luis 2013-2-19
It seems to me that you are not passing the correct value for the handles of the patch:
v1 = rand(81,1);
c1 = [1 0 1];
H1=histfit(v1);
set(H1(2),'Color',rand(1,3));
set(H1(1),'FaceColor',rand(1,3));
set(H1(1),'FaceAlpha',.25);
EDIT
Based on your comment, this might be what you are looking for:
bH = bar(randn(10));
get(bH,'Type') %For illustration purpose only.
pH = arrayfun(@(x) allchild(x),bH);
set(pH,'FaceAlpha',0.25);
In the future, please place comments to an answer under the answer, otherwise it might get confusing for other people joining the discussion.
Jorn
Jorn 2013-2-19
Jose-Luis, you are correct. But your solution does not work for barseries charts: it only works for single bars. If I use your solution on my barseries chart, the error returned is:
Error using specgraph.barseries/set The name 'FaceAlpha' is not an accessible property for an instance of class 'barseries'.
So I hope there's another solution!

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