On Mon, 2004-02-23 at 18:53, li xian wrote:
How to get the sum of the diag of matrix?
Thanks!
If 'm' is your matrix:
sum(diag(m))
See ?sum and ?diag, the latter of which will extract the diagonal of the
matrix.
Be sure to read the help for diag() fully for some of the usage caveats.
HTH,
A - array(1:4, dim=c(2,2))
sum(diag(A))
[1] 5
Is that what you want?
spencer graves
li xian wrote:
How to get the sum of the diag of matrix?
Thanks!
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sum(diag(X))
On Mon, 23 Feb 2004, li xian wrote:
How to get the sum of the diag of matrix?
Thanks!
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