On Jan 15, 2013, at 9:10 AM, Nuri Alpay Temiz wrote: > Hi everyone, > > I have a question on selecting and grouping elements of a data frame. For > example: > > A.df<- [ a c 0.9 > b x 0.8 > b z 0.5 > c y 0.9 > c x 0.7 > c z 0.6]
That is not R code. Matlab?, Python? > > > I want to create a list of a data frame that gives me the unique values of > column 1 of A.df so that i can create intersects. That is: > > B[a]<- [ c 0.9] > > B[b]<- [ x 0.8 > z 0.5] > > B[c]<- [ y 0.9 > x 0.7 > z 0.6] > > > B[c] n B[b] <- c(x,z) > That's some sort of coded message? We are supposed to know what the "n" operation will do when assigned a vector? Assuming your really do have a dataframe named B: intersect(B$c, B$b) Please code up examples in R in the future. -- David Winsemius Alameda, CA, USA ______________________________________________ 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.
