> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf Of Pradipto Banerjee > Sent: Thursday, September 27, 2012 9:13 AM > To: r-help@r-project.org > Subject: [R] equivalent of Stata "by construct" > > I am evaluating a switch from Stata to R. I don't need to extensive > Statistical methods, but the main reason I am exploring the switch is the > coding flexibility in R (e.g. Stata does not support linear/quadratic > programming). I have been going over the R syntax and I had a quick > question: > > In Stata, one has a very useful construction called "by", e.g. > > by month signal: gen xxx = myfunction(yyy zzz) if cond1==cond2 > > Similarly, in SAS, one can write > > by monthn signal; > if cond1=cond2 then xxx = myfunction(yyy zzz); > run; > > > I looked at a lot of R tutorials, but I haven't come across the equivalent > of the Stata or SAS "by" construct in R? > > >
Check out the function by() in base R. Dan Daniel Nordlund Bothell, WA USA ______________________________________________ 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.
