Calculate Standard deviation in table
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Hi,
I have a table with 20 columns, I want to make a new column with the standard deviation of each row from column 4 to 6.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/665015/image.jpeg)
So after column 6 i want to have a column with the stdev of all rows of column 4:6.
How can I do that?
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Chunru
2021-6-25
a = array2table(rand(5,8)) % Sample table
s = std(a{:, 4:6}, [], 2) % std along rows (dim=2)
b = [a table(s, 'VariableNames', {'std'})] % combine with original
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Erkan MSN
2022-1-24
If you want to calculate the standard deviation of the whole table:
For example "cax" is table.
1.6424 5.2601 1.4691 0.7361 0.2771
1.0531 0.5722 1.8804 4.9636 0.9451
1.8084 1.6537 1.5916 0.8352 0.7740
0.7550 1.4221 1.7003 2.5646 0.4272
2.2935 2.5158 0.7656 1.0110 2.0810
1.0765 0.5390 1.9687 2.0829 0.4572
1.0493 1.4736 1.2810 1.0911 0.2073
2.1630 0.5679 2.8582 1.6006 0.4746
1.1625 0.7333 0.2623 0.6887 0.7897
2.9148 0.2886 3.1662 0.3645 0.5730
std(cax,[],'all')
ans =
1.0786e+03
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