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rank
2001 Jun 06
1
The old Fortran underscore problem
...;R S Programming, R manuals and FAQ
and still can't find the answer.
In the Hmisc library I used the R scripts to build
the package, which creates Hmisc.so. I have
library.dynam('Hmisc', ...) in the .First.lib.
When doing library(Hmisc) I get
Error in dyn.load .... undefined symbol rank_
Note that I do not call dyn.load myself.
The Hmisc library has a Fortran module named
rcorr.f which issues CALL rank(....).
rank is an entry point in a C source file ranksort.c,
declared using "void rank(. .. .)".
All source files seemed to compile fine.
How do I call the C rank entry fr...
2009 Aug 04
1
Rank of matrix
Dear all,
Rank of a matrix depends on which factors? Only on rows or
coumns? or both ? If there is a collinearlity in the variables ( columns )
does it effects the rank?
> X<-matrix((rnorm(10000)),50)
> dim(X)
[1] 50 200
> qr(X)$rank
[1] 50
> X[,2]<-X[,30]
> qr(X)$rank
[1] 50
> X[10,]<-X[7,]
> qr(X)$rank
[1] 49
Thanks
Alex
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2010 Jul 14
5
Matrix Size
hi -
i just started using R as i am trying to figure out how perform a linear
regression on a huge matrix.
i am sure this topic has passed through the email list before but could
not find anything in the archives.
i have a matrix that is 2,000,000 x 170,000 the values right now are
arbitray.
i try to allocate this on a x86_64 machine with 16G of ram and i get the
following:
> x <-