Standard deviation of columns of a table

Question

Wietze Zijpp 2022-4-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1688484-standard-deviation-of-columns-of-a-table

回答： Voss 2022-4-4

采纳的回答： Voss

Suppose I have a 30x3 table.

Now I would like to find the standard deviation of each column

I tried

stdev= std(montherrors(:,1))

But that does not work unfortunately

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Answer 1

Voss 2022-4-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1688484-standard-deviation-of-columns-of-a-table#answer_934599

在 MATLAB Online 中打开

Here's one way:

data = num2cell(randn(30,3),1);
montherrors = table(data{:})
montherrors = 30×3 table
Var1Var2Var3____________________________

    -0.034324      0.83995    -0.0038145
      -0.6445      -1.0437      0.018688
    -0.055602      -1.9906      0.064362
      0.80357     -0.71912       0.11963
       0.5391       1.5864      -0.51055
      0.93737        -1.03      -0.99418
      -1.3181     -0.50919        -1.028
      -1.8117     0.015721       0.20497
      -1.2746       1.5713       -1.5506
       1.3839    -0.035712        1.0359
      0.86795        0.426      -0.51133
     -0.88336      -1.5662       0.39297
      0.83966     -0.28617       0.76124
       1.3973     0.012742      -0.20298
     -0.69736     -0.85323        0.7816
      0.85455     -0.53487       0.12378
stdev = std(montherrors{:,:},[],1)
stdev = 1×3
    0.9951    0.9624    0.7766