Create an array that has ones

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Sean Raffetto
Sean Raffetto 2016-7-14
编辑： Andrei Bobrov 2016-7-14
Hello,
I am trying to create a 1x256 cell array where each matrix inside is 256x41. I want each matrix to have a row of ones and the rest zeroes. For example, the first matrix will have the first row be ones and the rest zeroes. The second matrix will have the second row be all ones with the first row and all the rows after the second row be zeroes. Help? I'd like to loop this.
Thanks

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2016-7-14
A=arrayfun(@(x) circshift([zeros(1,41);ones(255,41)],[x 1]),1:255,'un',0)

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2016-7-14
编辑：Andrei Bobrov 2016-7-14
num2cell(permute(repmat(eye(256),1,1,41),[1,3,2]),[1,2])
or
num2cell(bsxfun(@eq,(1:256)'*ones(1,41),reshape(1:256,1,1,[])),[1,2])
or
m = 256;
n = 41;
a = [ones(1,n);zeros(m,n)];
C = cell(m,1);
for jj = 1:m
ii = jj + 1;
a([jj,ii]) = a([ii,jj]);
C{jj} = a(2:end,:);
end

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