Dear Uwe, I've often wondered why T and F aren't reserved words in R as TRUE and FALSE are. Perhaps there's some use of T and F as variables, but that seems ill-advised.
Regards, John -------------------------------- John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -------------------------------- > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Uwe Ligges > Sent: Thursday, May 19, 2005 10:08 AM > To: Chalasani, Prasad > Cc: [email protected] > 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:[EMAIL PROTECTED] > > Sent: Thursday, May 19, 2005 10:49 AM > > To: Chalasani, Prasad > > Cc: [email protected] > > 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 > > > > > > > >>______________________________________________ > >>[email protected] mailing list > >>https://stat.ethz.ch/mailman/listinfo/r-help > >>PLEASE do read the posting guide! > >>http://www.R-project.org/posting-guide.html > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
