How to create random binary matrix with specified number of ones in each row and column?

Number of raws = M, number of columns = N, number of one's in each row = Nrow, number of one's in each column = Ncolumn.

Answer 1

[Walter Roberson]

See https://www.mathworks.com/matlabcentral/answers/439541-how-to-create-a-random-binary-matrix-with-equal-number-of-ones-in-each-column-and-equal-number-of-1#answer_356191 for practical code (but which I do not promise will always work.)

Answer 2

[Jan]

This will not work in general: You cannot e.g. place 2 elements per row and per column in a 5 x 5 matrix:

1 0 0 0 0   % <-- here one 1 is missing and cannot be inserted
1 1 0 0 0
0 1 1 0 0
0 0 1 1 0
0 0 0 1 1

But you can create a 6x6 matrix with 3 ones in each column and row.

[Walter Roberson]

Your example does not appear to be complete.

[0 0 1 1 0; 0 1 1 0 0; 1 1 0 0 0; 1 0 0 0 1; 0 0 0 1 1]

ans =

0 0 1 1 0

0 1 1 0 0

1 1 0 0 0

1 0 0 0 1

0 0 0 1 1

This is a 5 x 5 matrix with two 1's per row and per column.

Furthermore for your original matrix, insert the 1 at the top right corner:

1 0 0 0 1

1 1 0 0 0

0 1 1 0 0

0 0 1 1 0

0 0 0 1 1