Special matrix with zeros and ones

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ABDULAZIZ
ABDULAZIZ 2015년 3월 6일
편집: ABDULAZIZ 2015년 3월 6일
Hello Everyone,
I have a special matrix and can not create it in faster way
The example of a matrix is as follows:
m=[1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0;
0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0;
0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0;
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1]
I can build it up by using ones and zeros, but it will take me a long time to do that, specially when I have a very big matrix.
Thanks in advance.
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Jan
Jan 2015년 3월 6일
I've formatted your code.
James Tursa
James Tursa 2015년 3월 6일
It's going to take us even longer unless we know the pattern rules. Can you explain a bit more about what the pattern is for a "very big matrix"?

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Jan
Jan 2015년 3월 6일
편집: Jan 2015년 3월 6일
Are you looking for kron?
kron(eye(4), ones(1, 4))
kron is not efficient. This might be faster, but less nice:
n = 4;
ind = repmat(n, 1, n*n-1);
ind(n:n:n*n-1) = n + 1;
M = zeros(n, n*n);
M(cumsum([1, ind])) = 1;

추가 답변 (2개)

Rodney Buller
Rodney Buller 2015년 3월 6일
Have you given this a try?
m=zero[4 16] m(1,1:4)=1; m(2,5:8)=1; m(3,9:12)=1; m(4,13:16)=1;
Assign a matrix as large as you need then, assigning values afterwards. variable(row,column)=assignment val
  댓글 수: 1
ABDULAZIZ
ABDULAZIZ 2015년 3월 6일
편집: ABDULAZIZ 2015년 3월 6일
Thank you,
This answer is correct , but it will take too much time for data entry when I have a very big matrix. Thanks again for your effort

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ABDULAZIZ
ABDULAZIZ 2015년 3월 6일
Thanks Jan Yes 100%, that what I have been looking for. Thank you very so much.

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