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2004 Nov 25
4
Avoiding for-loops
Hello R-users,
I have a symmetric matrix of numerical values and I
want to obtain those values in the upper or lower
triangle of the matrix in a vector. I tried to do the
job by using two for-loops but it doens't seem to be a
clever way, and I'd like to know a more efficient code
for a large matrix of thousands of rows and columns.
Below is my code for your reference.
Thanks a lot.