Normalize each column of a matrix
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I have one doubt that, suppose if a matrix has zero mean and unit variance, then whether each of its columns has zero mean and unit variance or not..?
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Jan
le 10 Déc 2012
What is the "mean" of a matrix exactly? I do not think that this is mathematically defined.
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Matt J
le 10 Déc 2012
No. Take the matrix
A=[1 -1; 1 -1]
Clearly A(:) has zero mean and unit variance, but its columns individually do not.
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