Re: a random matrix of zeros and ones with exactly N ones

Omid wrote:


How can I generate a random matrix of a defined size with elements
zero or one with exactly M ones? For example a 4*5 matrix with 9
ones
and 11 zeros. I want it to be completely random such that the
generated matrix be able to span the space of all possible
permutations of zeros and ones (M ones)in the matrix.

See NTRUE:
<http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=10924&objectType=FILE>

A = ntrue(9,4,5) ;
It uses randperm to fill the entries, as in the other replies.

hth
Jos
.

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