Extracting from boxchart function the median, quartiles, and whisker data.

Question

hxen 2023-5-29

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1975324-extracting-from-boxchart-function-the-median-quartiles-and-whisker-data

回答： hxen 2023-5-30

Hello dear community. I've got mutliple comparisons that I have plotted with boxchart. When I hover the cursor over any boxoplot, I can see the median, quartile, and whisker info. But I'm having difficulty extracting from the boxchart properities the numerical values. My goal is to the save directly these data value that boxchart clearly produce into an array.

Here's some mock code for three boxplots :

y1 = rand(10,1);

y2 = rand(8,1);

y3 =rand(12,1);

X = [ones(length(y1),1); 2*ones(length(y2),1); 3*ones(length(y3),1)]; % boxchart positions for raw data

Y = [y1; y2; y3]; % raw data values

b = boxchart(X,Y);

If I where to type "b.DataTipTemplate.DataTipRows.Value" I can see the variables Whiskers and Medians and others but cannot access them with dot notation. How would I get the values for say the second box plot?

b.DataTipTemplate.DataTipRows.Value
ans = 'Position'
ans = 'Num Points'
ans = 'Num Outliers'
ans = 'Median'
ans = 'Quartiles'
ans = 'Whiskers'
ans = 'Outlier Value'

Thanks in advance.

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Answer 1

Matt J 2023-5-30

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1975324-extracting-from-boxchart-function-the-median-quartiles-and-whisker-data#answer_1246714

编辑：Matt J 2023-5-30

I don't believe those quantitites are directly available as permanent property data. When you position the cursor over one of the boxes, a GUI callback function is invoked to calculate them on the fly from the XData, YData property values. You can, of course, write your own function to do so as well.