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

In this matrix All entries are zeros except for a single 1 in each row and at most a single 1 in each column?

[John D'Errico]

Trivial.

eye(m,n)

That fits your requirements.

Do you have some more information on what you really need?

[sn at]

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]

Answer 1

[John D'Errico]

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

[sn at]

Thanks.

Answer 2

[the cyclist]

One way to do this

eye(m,n)