Do ?'for' to learn about for loops. Look at FAQ 7.21 for the other part of the question (the most important part of the answer is the end where it tells you to use lists instead like Patrick suggests).
-- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Hey Sky > Sent: Tuesday, August 03, 2010 6:30 PM > To: R > Subject: [R] does R have a command the same with Stata's loop command: > ` ' > > hey, Rers > > in Stata therer is a loop command ` ' which could do the following: > > forvalue i=1/10 { > gen x`i'=expression > } > > this will generate variable: x1,x2,,,,,x10. so, does R have a > corresponding one > to this? > > > And one more very basic question: after I open a file and modify it, > such as > generate some new variables and change some old ones, how to use the > changed > dataset in analysis, except the method save and reload it? > > > I have tried but did not get the right thing done: > mydata<-read(flie=".....") > ........ > detach() > attach(names of my data set) > > > any answer are appreciated. > > Nan > from Montreal > > > > ______________________________________________ > 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.
