Creating a (nxn) Matrix using a for loop
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How do i create a (n x n) matrix whose elements are either +3 or –3 such that the sign of each element is different from its adjacent elements, both from those above and below it and from those on either side of it (see Y below). I want to do this using a for loop.
3 个评论
Andrew Newell
2011-4-11
You say "see Y below" but there's no Y.
Andrew Newell
2011-4-11
This is a duplicate post. What's wrong with the answers to the previous question? I suggest you delete this question and go back there.
Walter Roberson
2011-5-13
duplicates http://www.mathworks.com/matlabcentral/answers/5202-how-to-create-a-nxn-matrix-with-alternating-sign
回答（1 个）
the cyclist
2011-4-11
Here's one way, without a for loop:
A = 3*reshape((-ones(1,n^2)).^(1:n^2),[n n])
Force a for loop into that somewhere.
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