Thank you to all for your ideas. They all solved my problem nicely. And I learned about paste() too!
--Chris Christopher W. Ryan, MD SUNY Upstate Medical University Clinical Campus at Binghamton 40 Arch Street, Johnson City, NY 13790 cryanatbinghamtondotedu PGP public keys available at http://home.stny.rr.com/ryancw/ "If you want to build a ship, don't drum up the men to gather wood, divide the work and give orders. Instead, teach them to yearn for the vast and endless sea." [Antoine de St. Exupery] milton ruser wrote: > May be this helps: > > > jaw<-data.frame(vara=1:20,age=runif(20)) > > for (i in 2:6) { > jaw[paste("agepow",i, sep="")] <- jaw["age"]^i > } > > jaw<-round(jaw,2) # It is just to help the check task > > > > Cheers, > > > > Miltinho Astronauta > > Brazil > > > > > > > > On 7/14/08, *Christopher W. Ryan* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > R 2.5.1 on WinXP > > I'm trying to create new variables in a dataframe called jaw, as powers > of jaw$age up to the sixth power, and name them > > jaw$age.(--the digit corresponding to the power--) > > Obviously none of these work (silly for me to try, I suppose): > > for (i in 2:6) { > jaw$age.'i' <- jaw$age^i > } > > for (i in 2:6) { > jaw$age.i <- jaw$age^i > } > > for (i in 2:6) { > jaw$age."i" <- jaw$age^i > } > > What is the proper syntax to create and name these variables all at > once? > > Thanks. > > --Chris > -- > Christopher W. Ryan, MD > SUNY Upstate Medical University Clinical Campus at Binghamton > 40 Arch Street, Johnson City, NY 13790 > cryanatbinghamtondotedu > PGP public keys available at http://home.stny.rr.com/ryancw/ > > "If you want to build a ship, don't drum up the men to gather wood, > divide the work and give orders. Instead, teach them to yearn for the > vast and endless sea." [Antoine de St. Exupery] > > ______________________________________________ > R-help@r-project.org <mailto:R-help@r-project.org> mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
