Matrix with some sort of pattern

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Andreas
Andreas 2013-4-24
移动：Matt J 2022-11-17
Hi everybody, i would like to make a matrices like this [1,1,1,1,1,0,0,0,0,0;0,0,0,0,0,1,1,1,1,1;] or this [-1 0 0;-1 0 0;-1 0 0;-1 -1 0;-1 -1 0; -1 -1 0;-1 -1 -1;-1 -1 -1;-1 -1 -1] in such a way that 'for' loop would be unnecessary.i was thinking something about repmat or so,because of the pattern that this kind of matrices seem to have.any ideas??? Thank you!!

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Matt J
Matt J 2013-4-24
You could use KRON
>> kron(eye(2), ones(1,5))
>> kron(tril(ones(3)),-ones(3,1))
  2 个评论
Andreas
Andreas 2013-4-24
移动：Matt J 2022-11-17
Matt J. YOU are amazing. Thanx.
Mishaal Amir
Mishaal Amir 2022-11-17
How to do this for an 9 by 9 matrix, with the number 9s surrounding the borders and the 0s in the center of the matrix?

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