Transpose of a matrix

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lola 2014-3-11

评论： Patrik Ek 2014-3-11

AT, AijT= Aji. The jith entry of A is the ijth entry of i.

For example,

A =

     1     2
     3     4

>> A'

ans =

     1     3
     2     4

When is A = AT? That is, when is the transpose of a matrix equal to itself?

Walter Roberson 2014-3-11

This is not a MATLAB question

Patrik Ek 2014-3-11

may I recommend maths stack exchange?

Walter Roberson 2014-3-11

A matrix is its own transpose when it is symmetric around the main diagonal. In the case of the 2 x 2 matrix, A12 would have to equal A21

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