From: John Fox <jfox_at_mcmaster.ca>

Date: Fri 20 May 2005 - 01:55:22 EST

John Fox

Department of Sociology

McMaster University

Hamilton, Ontario

Canada L8S 4M4

905-525-9140x23604

http://socserv.mcmaster.ca/jfox

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 20 01:58:36 2005

Date: Fri 20 May 2005 - 01:55:22 EST

John Fox

Department of Sociology

McMaster University

Hamilton, Ontario

Canada L8S 4M4

905-525-9140x23604

http://socserv.mcmaster.ca/jfox

> -----Original Message-----

*> From: r-help-bounces@stat.math.ethz.ch
**> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Uwe Ligges
**> Sent: Thursday, May 19, 2005 10:08 AM
**> To: Chalasani, Prasad
**> Cc: r-help@stat.math.ethz.ch
**> Subject: Re: [R] R annoyances
**>
**> Chalasani, Prasad wrote:
**>
**> > Thanks all for pointing out that I can use
**> > mtx[,1,drop=F]
**>
**>
**> Which, for example, won't work for
**> F <- 10.25
**>
**> ---> drop=FALSE !
**> ^^^^^
**>
**> Uwe Ligges
**>
**>
**>
**> >
**> >
**> > -----Original Message-----
**> > From: Uwe Ligges [mailto:ligges@statistik.uni-dortmund.de]
**> > Sent: Thursday, May 19, 2005 10:49 AM
**> > To: Chalasani, Prasad
**> > Cc: r-help@stat.math.ethz.ch
**> > Subject: Re: [R] R annoyances
**> >
**> >
**> > Chalasani, Prasad wrote:
**> >
**> >>Dear R Folks,
**> >>I'm a big fan of R, but there are a couple of things that
**> repeatedly
**> >>annoy me, and I wondered if anyone has neat ways to deal with them.
**> >>
**> >>(a) When using "apply" row-wise to a matrix, it returns
**> >> the results column-wise, and to preserve the original
**> >> orientation, I've to do a transpose. E.g. I've to keep
**> >> doing a transpose, which I consider to be quite annoying.
**> >>
**> >> transformed.mtx <- t(apply( mtx, 1, exp))
**> >
**> >
**> > I'd rather type
**> >
**> > exp(mtx)
**> >
**> >
**> >
**> >
**> >>(b) When extracting 2 or more columns of a matrix,
**> >> R returns the result as a matrix, BUT when extracting
**> >> just one column, it returns a vector/array, rather than
**> >> a matrix, so I've to keep doing as.matrix, which is annoying.
**> >>
**> >> sub.mtx <- as.matrix(mtx[,1])
**> >>
**> >> Of course I could write a suitable function
**> >> cols <- function(mtx,range) as.matrix(mtx[, range])
**> >> but then I lose the syntactic sugar of being able to say "[,1]".
**> >
**> >
**> > The docs suggest:
**> >
**> > mtx[ , 1, drop = FALSE]
**> >
**> >
**> > Uwe Ligges
**> >
**> >
**> >
**> >>______________________________________________
**> >>R-help@stat.math.ethz.ch mailing list
**> >>https://stat.ethz.ch/mailman/listinfo/r-help
**> >>PLEASE do read the posting guide!
**> >>http://www.R-project.org/posting-guide.html
**>
**> ______________________________________________
**> R-help@stat.math.ethz.ch mailing list
**> https://stat.ethz.ch/mailman/listinfo/r-help
**> PLEASE do read the posting guide!
**> http://www.R-project.org/posting-guide.html
*

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 20 01:58:36 2005

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