Thanks Jim and Herinque for you reply.
The substitution you are both proposing works fine, except when a or b contains decimal numbers (which is mostly my case in a real dataset). In this case, there is no distinction between the decimal point and the one introduced by the split function. If the split function cannot be customized, then I guess I have to first substitute the decimal point in my dataset by e.g. a * sign and change it back to a . when the split is done... Sebastien jim holtman a écrit : > Here is one way: > >> a<-1:10 >> b<-21:30 >> mydata<-data.frame(a,b) >> mydata.split<-split(mydata,(mydata[,1:2]),drop=TRUE) >> x <- mydata.split >> # customize the names >> names(x) <- sapply(strsplit(names(x), "\\."), paste, collapse="-my character-") >> x > $`1-my character-21` > a b > 1 1 21 > > $`2-my character-22` > a b > 2 2 22 > > $`3-my character-23` > a b > 3 3 23 > ........... > > On Nov 24, 2007 6:15 PM, <[EMAIL PROTECTED]> wrote: >> >> Dear R-users, >> >> The following code splits a very simple dataframe into a list, each element of >> the list being one line of the dataframe. You will see that the split function >> names each element of the list by using uses the content of a and b and merging >> them with a "." character. Is there a way to customize this character? >> >> a<-1:10 >> b<-21:30 >> mydata<-data.frame(a,b) >> mydata.split<-split(mydata,(mydata[,1:2]),drop=TRUE) >> mydata.split >> >> Thanks in advance for your help. >> >> Sebastien >> >> ______________________________________________ >> 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. >> > > > ______________________________________________ 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.
