How to create a m*n matrix with 0,1 entries?

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sn at
sn at 2017-2-14
编辑： sn at 2017-2-14
In this matrix All entries are zeros except for a single 1 in each row and at most a single 1 in each column?
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John D'Errico
John D'Errico 2017-2-14
Trivial.
eye(m,n)
That fits your requirements.
Do you have some more information on what you really need?
sn at
sn at 2017-2-14
nonzero elements are not necessarily on the main diagonal, in fact they must be randomly distributed: for example like this.
[1 0 0 0
0 0 1 0]

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John D'Errico
John D'Errico 2017-2-14
编辑：John D'Errico 2017-2-14
Did you say random until we had to prod you? :)
The requirements imply that m<=n.
A = eye(m,n);
A(randperm(m),randperm(n))
That yields a fixed number of ones. If you want the result to sometimes have less than m ones, then just start with a diagonal matrix with some of the diagonal elements as zero. Then you can define the number of non-zeros in advance. You can even choose the number of them randomly.
help diag

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the cyclist
the cyclist 2017-2-14
One way to do this
eye(m,n)

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