how to create grouped Box plot

Question

baran 2014-9-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/154761-how-to-create-grouped-box-plot

评论： dasilvarosa 2017-10-14

hi, i want to create a box plot for my data. my data is in the excel file, with two sheet. each sheet have 10 column. i want to grouped first column in two sheet as box plot parameter 1. and second column in two sheet as parameter 2 and so on . i write this code but it dont work, please guide me . and is there any way that each group have different colors. thanks so much

    % code
clear
clc
fontsize=14;
s1 =xlsread('data.xlsx','s1');
s2=xlsread('data.xlsx','s2');
h={s2,s1};
figure,
boxplot(h,'Labels',{'par1','par2','par3','par4','par5','par6','par7','par8','par9','par10'})

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baran 2014-9-14

在 MATLAB Online 中打开

the error is:

    Error using boxplot>straightenX (line 893)
'X' parameter must be a numeric vector or matrix.

Error in boxplot (line 273) [xDat,gDat,origRow,xlen,gexplicit,origInd,origNumXCols] = straightenX(x,g);

Error in Copy_of_boxplott2 (line 8) boxplot(h,'Labels',{'par1','par2','par3','par4','par5','par6','par7','par8','par9','par10'

dasilvarosa 2017-10-14

Did you solve this error? I'm encountering the same problem.

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Answer 1

Star Strider 2014-9-14

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/154761-how-to-create-grouped-box-plot#answer_151667

在 MATLAB Online 中打开

Assuming ‘s1’ and ‘s2’ are column vectors or column-wise data matrices, change ‘h’ to:

h=[s2,s1];

(using square brackets [] to indicate a matrix rather than curly brackets {} indicating a cell array) and see if that improves things. If you are intending a cell array because ‘s1’ and ‘s2’ do not have the same row length, you have to resolve that problem first.

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baran 2014-9-14

在 MATLAB Online 中打开

can i use this code instead????

    % code
clear
clc
fontsize=14;
s1 =xlsread('data.xlsx','s1');
s2=xlsread('data.xlsx','s2');
x=[s1(:,1), s2(:,1), s1(:,2), s2(:,2), ...]
group=[1,1,2,2, ...]
figure,
boxplot(x, group)
thanks

Star Strider 2014-9-14

编辑：Star Strider 2014-9-14

在 MATLAB Online 中打开

As I mentioned in my Answer, ‘If you are intending a cell array because ‘s1’ and ‘s2’ do not have the same row length, you have to resolve that problem first.’

Fortunately, boxplot (and several Statistics Toolbox functions) ignore ‘NaN’ values, so create a ‘NaN’ matrix and then fill its columns with ‘s1’ and ‘s2’ respectively:

s1 = randi(10, 15, 1);
s2 = randi(12, 20, 1);
s3 = NaN(max([length(s1), length(s2)]), 2); % Create ‘NaN’ Array 
s3(1:size(s1,1),1) = s1;                    % Copy ‘s1’ to first column
s3(:,2) = s2;                               % Copy ‘s2’ to second column
figure(1)
boxplot(s1)
figure(2)
boxplot(s2)
figure(3)
boxplot(s3)

Compare the three plots to demonstrate that ‘s1’ is the same even if it is padded with ‘NaN’ values. This should work as written with your data. It automatically adjusts to differences in the row length of ‘s1’ and ‘s2’.

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