Create a grouped boxplot

Question

NA 2021-7-7

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/873753-create-a-grouped-boxplot

评论： Adam Danz 2022-9-22

I have 3 groups of data A, B, and C.

A = rand(100,8);
B = rand(100,8)*2;
C = rand(100,8)*4;

I want to plot Box chart of grpup A,B and C.

The internal label of each group is {'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h'}.

I found boxplotgroup(), and used below code

data = {A,B,C};
boxplotGroup(data, 'PrimaryLabels', {'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h'}, ...
  'SecondaryLabels',{'A', 'B' 'C'}, 'InterGroupSpace', 3)

But I got this error.

Error using assert (line 5)
The number of primary labels must equal either the number of bars per group
(3) or the number of total bars (24).
Error in boxplotGroup (line 155)
    assert(ismember(numel(p.Results.primarylabels),[nMembers,
    nMembers*nGroups]), ...
Error in (line 13)
boxplotGroup(data, 'PrimaryLabels', {'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h'}, ...
 

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Answer 1

Christopher McCausland 2021-7-7

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https://ww2.mathworks.cn/matlabcentral/answers/873753-create-a-grouped-boxplot#answer_741748

编辑：Christopher McCausland 2021-7-7

Hi NA,

From the documentation here (See section boxplotGroup(__,'primaryLabels',c) ) the number of primary lables should match the number of boxplotGroups. i.e. you appear to be plotting three box plots (A,B,C) but trying to give these box plots eight names ('a' 'b' 'c' 'd' 'e' 'f' 'g' 'h').

I beleive that you are trying to show something like the last example in boxplotGroup(__,'secondaryLabels',s) (shown below) in which case swap your primary and secondary labels.

Let me know if that helps,

Christopher