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How do you extract even columns and even rows from an nxn matrix?

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Miguel L
Miguel L 2017-9-20
评论： Miguel L 2017-9-20
How do you extract even columns and even rows from an nxn matrix?
I have a matrix of 2574 x 5148 and I only need the even columns and even rows.
Thanks!

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Walter Roberson
Walter Roberson 2017-9-20
YourMatrix(2:2:end, 2:2:end)

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