Thanks, I have considered using array but I dont belive its possible. For my function isn't really paste(), its a custom function that takes the three different parameters. The result however is a matrix where the size depends on the inputs. I belive thats hard to fit into an array. But if you have any suggestions how I could improve the code. Felle free to pass them over, I would be glad for anything.
//Tom Charles C. Berry wrote: > > On Tue, 7 Aug 2007, Tom.O wrote: > >> >> Hi >> Im pretty new to R and I have run in to a problem. How do I name all the >> levels in this list. > > One way: > > MyList <- > mapply(function(x) mapply( > function(y) mapply( function(z) > paste(unlist(x),unlist(y),unlist(z)), > Lev3, SIMPLIFY=FALSE ), > Lev2, SIMPLIFY=FALSE ), > Lev1, SIMPLIFY=FALSE ) > > > However, for many purposes you might better use an array: > > MyArray.dimnames <- list(Lev1,Lev2,Lev3) > combos <- rev( expand.grid (Lev3,Lev2,Lev1) ) > elements <- do.call( paste, combos ) > MyArray <- array( elements, dim=sapply(MyArray.dimnames,length), > dimnames=MyArray.dimnames ) > MyArray['A1','B1','C2'] > > > >> >> Lev1 <- c("A1","A2") >> Lev2 <- c("B1","B2") >> Lev3 <- c("C1","C2") >> >> MyList <- lapply(Lev1,function(x){ >> lapply(Lev2,function(y){ >> lapply(Lev3,function(z){ >> paste(unlist(x),unlist(y),unlist(z)) >> })})}) >> >> I would like to name the different levels in the list with the differnt >> inputs. >> So that the first level in named by the inputs in Lev1 and the second >> Level >> by the inputs in Lev2, and so on >> >> I would then like to use this call >> >> MyList$A1$B1$C1 >>> "A1 B1 C1" >> >> Regards Tom >> -- >> View this message in context: >> http://www.nabble.com/Naming-Lists-tf4228968.html#a12030717 >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> 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. >> > > Charles C. Berry (858) 534-2098 > Dept of Family/Preventive > Medicine > E mailto:[EMAIL PROTECTED] UC San Diego > http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901 > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/Naming-Lists-tf4228968.html#a12047294 Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.