Macro stuff à la SAS is something that should be avoided whenever possible - it's messy, limited, and limiting. (I've done it ocasionally and it works, but I think it's best not to go there.) Read the documentation on lists (in particular named lists), and keep everything in one or more lists. For example: lst <- list() for (v in c("var1","var2","var3")) lst[[v]] <- runif(sample(c(50,100),1)) for (v in c("var1","var2","var3")) print(sd(lst[[v]]))
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Johannes Hüsing > Sent: Tuesday, May 23, 2006 12:26 PM > To: r-help@stat.math.ethz.ch > Subject: [R] Manipulating code? > > Dear expeRts, > I am currently struggling with the problem of finding > cut points for a set of stimulus variables. I would like > to obtain cut points iteratively for each variable by > re-applying a dichotomised variable in the model and then > recalculate it. I planned to have fixed names for the > dichotomised variables so I could use the same syntax > for every recalculation of the whole model. I furthermore > want to reiterate the process until no cut point changes > any more. > > My problem is in accomplishing this syntactically. How can > I pass a variable name to a function without getting lost > in "as.symbol" and "eval" and "parse" mayhem? I am feeling > I am thinking too much in macro expansion à la SAS when > trying to tackle this. > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html