On 23/11/2011 2:29 PM, matric wrote:
Hi, I'd like to create a function that accepts as arguments a string that is to be substituted within a variable name. For instance, suppose I have a data frame df:df<-data.frame(x_narrow=c(rnorm(100,0,1)),x_wide=c(rnorm(100,0,10))) What I have in mind is something like: f<- function(string){ var = paste("x_",string,sep = "") df$var } which does not work. Any suggestion for modifications? Thanks in advance,
For indexing a dataframe, use the name as the column index: df[, var] will work. Duncan Murdoch ______________________________________________ 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.
