Created
January 26, 2012 18:50
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Permutation of a matrix with the diagonal kept constant
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| mat = matrix(abs(round(rnorm(100,15,8),0))+1,10) | |
| diag(mat) = 0 | |
| print(mat) | |
| permat = function(mat) | |
| { | |
| mat[lower.tri(mat)+upper.tri(mat)==1] = sample(mat[lower.tri(mat)+upper.tri(mat)==1],replace=FALSE) | |
| return(mat) | |
| } | |
| replicate(100,permat(mat)) |
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