[R] Rank of a matrix?
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Fri Jun 7 09:45:51 CEST 2002
Manuel Castejón Limas <manuel.castejon at dim.unirioja.es> writes:
> Hello everyone,
> this is a very simple question but I could not find the answer. :-(
> Is there any function in R for calculating the rank of a matrix?
> (In the sense of the dimension of the vectorial space that spans)
It's a byproduct of chol() and qr(), but beware that it is numerically
ill-defined due to round-off. Notice the tol= argument to qr().
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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