[R] quesion on diag of matrix

Marc Schwartz MSchwartz at medanalytics.com
Tue Feb 24 02:30:30 CET 2004

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:


See ?sum and ?diag, the latter of which will extract the diagonal of the

Be sure to read the help for diag() fully for some of the usage caveats.


Marc Schwartz

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