type "help.start()" in the R console or open manually the "C:\Program Files\R\rw1091\doc\html\rwin.html" file and you will get all the available on-line documentation that ships with each R installation.
Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/16/396887 Fax: +32/16/337015 Web: http://www.med.kuleuven.ac.be/biostat/ http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Dan Bolser" <[EMAIL PROTECTED]> To: "Dimitris Rizopoulos" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, September 16, 2004 2:55 PM Subject: Re: [R] Conditionally swap two columns of a data.frame? > > Minter! > > Is there an R cookbook? which lists this kind of common problem and common > solution? > > > On Thu, 16 Sep 2004, Dimitris Rizopoulos wrote: > > >Hi Dan, > > > >do you need something like that, > > > >dat <- data.frame(V1=rnorm(40000, 10), V2=rnorm(40000, 10)) > >ratioV1V2 <- ifelse(dat$V1>dat$V2, dat$V1/dat$V2, dat$V2/dat$V1) > > > >I hope it helps. > > > >Best, > >Dimitris > > > >---- > >Dimitris Rizopoulos > >Ph.D. Student > >Biostatistical Centre > >School of Public Health > >Catholic University of Leuven > > > >Address: Kapucijnenvoer 35, Leuven, Belgium > >Tel: +32/16/396887 > >Fax: +32/16/337015 > >Web: http://www.med.kuleuven.ac.be/biostat/ > > http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm > > > >----- Original Message ----- > >From: "Dan Bolser" <[EMAIL PROTECTED]> > >To: <[EMAIL PROTECTED]> > >Sent: Thursday, September 16, 2004 2:19 PM > >Subject: [R] Conditionally swap two columns of a data.frame? > > > > > >> > >> I am doing this a kinda dumb way, and it is apparetnly taking > >> forever. > >> > >> I have a data frame with two numeric columns. I want to look at > >their > >> correlation, and I am looking at the size ratio between the two. > >> > >> i.e. > >> > >> plot(density(data$V1/data$V2)) > >> > >> This kinda gives me a normal curve showing something about the > >> distribution of the two values. > >> > >> I want to make sure that V1/V2 is always > 1 ... > >> > >> for (i in 1:length(row.names(data)) ){ > >> ratioV1V2 <- if(V1>V2) V1/V2 else V2/V1 > >> } > >> > >> This is a bit of a hack, and is taking forever for some reson (about > >> 40,000 rows in my data.frame). > >> > >> I would just like to swap the values in the data frame (to put the > >bigest > >> first for example), then use the above plot to get what I want. > >> > >> Should I use the DB backend to the data to make the dump in this > >way? > >> (involves some hacky sql) > >> > >> Considering I am interested in the range of the ratio between V1 and > >V2, > >> should I be looking at doing a different analysis? > >> > >> I am so dumb, any help is appreciated, > >> > >> Dan. > >> > >> ______________________________________________ > >> [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