Dear R'ers, I am fighting with a problem that is driving me crazy. I use "lm" in my user-defined function, but it seems to be looking for weights outside of my function's environment:
### Generating example data: x<-data.frame(y=rnorm(100,0,1),a=rnorm(100,1,1),b=rnorm(100,2,1)) myweights<-runif(100) data.for.regression<-x[1:3] ### Creating function "weighted.reg": weighted.reg=function(formula, MyData, filename,WeightsVector) { print(dim(MyData)) print(filename) print(length(WeightsVector)) regr.f<-lm(formula,MyData,weights=WeightsVector,na.action=na.omit) results<-as.data.frame(round(summary(regr.f)$coeff,3)) write.csv(results,file=filename) return(results) } ### Running "weighted.reg" with my data: reg2<-weighted.reg(y~., MyData=x, WeightsVector=myweights, filename="TEST.csv") I get an error: Error in eval(expr, envir, enclos) : object 'WeightsVector' not found Notice, that the function correctly prints length(WeightsVector). But it looks like "lm" is looking for weights (in the 4th line of the function) OUTSIDE the function and does not see WeightsVector. Why is it looking outside the function for the object that has just been defined inside the function? Thank you very much! -- Dimitri Liakhovitski Ninah Consulting www.ninah.com ______________________________________________ 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.