How about environment(formula) <- environment()
Vadim Ogranovich <vograno <at> evafunds.com> writes: : : This is a self-response . : : It was indeed a problem with environments. One way to get around is to "reset" the environment, e.g. inside : callGam do : formula <- as.formula(unclass(formula)) : : Not too aesthetic, but works. Is there a less kludgy way to do this? : : BTW, forgot to mention. This is R-1.9.1 on RH-7.3. : : Thanks, : Vadim : : > -----Original Message----- : > From: r-help-bounces <at> stat.math.ethz.ch : > [mailto:r-help-bounces <at> stat.math.ethz.ch] On Behalf Of Vadim : > Ogranovich : > Sent: Monday, September 27, 2004 3:24 PM : > To: r-help <at> stat.math.ethz.ch : > Subject: [R] passing formula arg to mgcv::gam : > : > Hi, : > : > I have a function, callGam, that fits a gam model to a subset : > of a dataframe. The argument to callGam is a formula, the : > subset is determined inside the function itself. My naÃve : > approach generates and error, see below. I guess this is : > because 'idx' is loocked up in the environment of 'formula', : > but I am too ignorant about environments to be able to tell : > for sure. Could someone please suggest a way around? : > : > Thanks, : > Vadim : > : > > library("mgcv") : > > : > > callGam <- function(formula) { : > + idx <- seq(10) : > + gam(formula, data=data.frame(x=rnorm(100), y=rnorm(100)), : > + subset=idx) } : > > : > > gam.fit <- callGam(y ~ x) : > Error in eval(expr, envir, enclos) : Object "idx" not found ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html