--- Deepayan Sarkar <[EMAIL PROTECTED]> wrote: > On Monday 19 July 2004 09:37, Wayne Jones wrote: > > Hi there fellow R-users, > > > > I'm stuck on this seemingly trivial problem. > > > > All I want to coerce a character string into a command. > > > > For example: > > > > x<-rnorm(20) > > y<-rnorm(20) > > str<-"lm(y~x)" > > > > I want to evaluate the "str" command. > > > > I have tried > > > > eval(as.expression(str)) > > eval(parse(text = str)) > > seems to work. > Couldn't eval be modified to automatically parse arguments if they're not expressions? Something like: eval2<-function(arg) { if (!is.expression(arg)) arg<-parse(text=arg) eval(arg) } Would a construction like eval2 have a downside or cause problems down the line?
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