how to generate symmetric matrix with zero-one elements, complexity index of this matrix (number of ones / (size )^2) = any number from zero to 1 and diagonal equal ones

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Hayam Wahdan
Hayam Wahdan 2016-1-21
评论： Star Strider 2016-1-23
how to generate symmetric matrix with zero-one elements, complexity index of this matrix (number of ones / (size )^2) = any number from zero to 1 and diagonal equal ones???

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Star Strider
Star Strider 2016-1-22
Here you go: Random Binary Matrix With Specified Probability Constrained To Have Ones On The Main Diagonal.
I have no idea if anyone else will ever use it, but it was intriguing enough as a problem for me to make it reasonably robust and put it up on the File Exchange. I’ll take it down eventually if it doesn’t generate any other interest.

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Triveni
Triveni 2016-1-22
编辑：Triveni 2016-1-22
A = [1 2 3 4 5; 1 2 3 4 5; 1 2 3 4 5];
symmetry = [A, flip(A)];
if you need diagonal as ones use
B =diag(symmetry) ==ones;

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