How to combine stacked bar chart and line chart?

Question

Truong Nhu 2021-2-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/740397-how-to-combine-stacked-bar-chart-and-line-chart

评论： dpb 2021-6-23

采纳的回答： dpb

在 MATLAB Online 中打开

I'm finding a way to combine a stacked bar chart and line chart look like this:

I have tried to use 2-axes graph in (https://www.mathworks.com/help/matlab/creating_plots/overlay-line-plot-on-bar-graph-using-different-y-axes-1.html)

and used the following code:

yyaxis left
b = bar(step,array,'stacked');
yyaxis right
p = plot(step,entropy);

But it seems not to work properly and the result is:

PS: I have 4 components in 1 bar. Sometimes, there's only 1 component presents inside the bar. The line graph works as expected though. Only the stacked bar has problems.

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randerss simil 2021-2-9

Can you show the array data ?

Truong Nhu 2021-2-9

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Yes, of course.

step = 1:1000:5073
array =
   0    15     0
   1    10     0
   0    15     0
   1    10     0
   0     0     0
   0    15     0

PS: In my opinion, matlab doesn't support to plot stacked bar on 2-axes graph. Maybe I need a work-around.

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Answer 1

dpb 2021-2-9

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Seems to work fine here...

figure
hB=bar(step,array,'stacked');
ylim([0 16])
xlim(xlim+[1 -1]*500)
yyaxis right
hL=plot(step,randi(15,1,6),'*-r');

yielded

The figure you show must have had 10-gazillion x values to have made such a blob.

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dpb 2021-2-9

Hmmm...that's also reproducible here on R2019b; which release are you using?

I had never noticed a similar anomaly with the yyaxis pair before, but I've not used it all that extensively other than here in Answers so don't know that had ever tried a stacked bar plot before.

It isn't unique to the 'stacked' option, either; a regular bar doesn't show different bar colors either as it should.

This appears to be a bug, indeed. Submit a bug report using the "Contact Us" link <ContactTMW Link>

Truong Nhu 2021-2-9

I'm using pre-release 2021a. Ok, I'll report this as a bug. Thanks a lot @dpb

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Answer 2

Cris LaPierre 2021-6-22

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https://ww2.mathworks.cn/matlabcentral/answers/740397-how-to-combine-stacked-bar-chart-and-line-chart#answer_730910

编辑：Cris LaPierre 2021-6-22

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I reached out internally. This is the expected behavior, but it's also fairly simple to change this back to what you would have expected by setting the colororder back to 'default'.

step = 1:1000:5073;

array = [0 0 15 0

4 1 10 0

0 0 15 0

4 1 10 0

15 0 0 0

0 0 15 0];

figure

yyaxis left % I added this line to regenerate the error

bar(step,array,'stacked');

ylim([0 16])

xlim(xlim+[1 -1]*500)

% reset colororder

colororder('default')

yyaxis right

plot(step,randi(15,1,6),'*-r');

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Cris LaPierre 2021-6-23

编辑：Cris LaPierre 2021-6-23

Stacked bar plots do, as you've shown above. It is the call to yyaxis that is changing axis properties. Expected behavior means the code is doing what it was written to do. It doesn't mean someone considered this exact scenario and decided this was what people would want. The feedback has been given. My purpose here was to provide a workaround while the feedback is considered.