This work fine with paste. Thanks Gabor. Seb
Gabor Grothendieck a écrit : > Try this using the BOD data frame that comes with R or > try using interaction in place of paste: > > split(BOD, do.call(paste, c(BOD, sep = ":")), drop=TRUE) > > > On Nov 25, 2007 10:23 AM, <[EMAIL PROTECTED]> wrote: > >> 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. >> >> > > > [[alternative HTML version deleted]]
______________________________________________ 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.
