[R] Symmetric matrix

Megh Dal megh700004 at yahoo.com
Sun Sep 21 19:47:47 CEST 2008

I have following matrix :

a = matrix(rnorm(36), 6)

Now I want to replace the lower-triangular elements with it's upper-triangular elements. That is I want to make a symmetric matrix from a. I have tried with lower.tri() and upper.tri() function, but got desired result. Can anyone please tell me how to do that?

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