Mean of Matrix Rows

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Vince Smith
Vince Smith 2019 年 5 月 18 日
コメント済み: Star Strider 2021 年 8 月 22 日
For any matrix A, how would I subtract the row means from each row, so that each row has a mean of zero?

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Star Strider
Star Strider 2019 年 5 月 18 日
The row means would be calculated as the mean of dimension 2.
Try this:
A = rand(5);
Anew = A - mean(A,2);
Check = mean(Anew,2) % Confirm: Mean = 0
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Yugal Kishore
Yugal Kishore 2021 年 8 月 22 日
sorry for activating this old thread but proved quite useful.
If I need to do a column means for the same problem statement, how would I do that. One way is to do a transpose of the matrix. I couldn't find anything in the documentataion.
Star Strider
Star Strider 2021 年 8 月 22 日
No worries!
To do column means, use mean without any extra arguments (it defaults to taking the column means), or specifying 1 as the dimension (instead of 2).
.

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