Hello people, I would like to know how can I use a list of variables (a char list) to have access to the collums from a dataframe to be used in some analysis like, just as example, a ploting task on a "for()" loop. Of course the code below is just to understand the way. In this example I have a dataframe with several collumns (more then fifty in my case) and I would like do use only some of them. I really need use a "var.list"!
a<-seq(1,100,1) b<-c(rep(c(1,2,3,4,5),20)) c<-rnorm(100,0,1) d<-runif(100,0,1) e<-c^2 f<-c/d g<-c-d df<-data.frame(cbind(a,b,c,d,e,f,g)) var.list<-c("c","f","g") for (myvar in var.list) { plot(density(df$myvar)) # here I need recover df$c , df$f and df$g } Kind regards Miltinho Brazil __________________________________________________ [[alternative HTML version deleted]] ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.