Let me clarify: I'm using this-- dfnew<- sapply(df, function(df) lookuptable[match(df, lookuptable [ ,1]), 2])
>lookup 0101 01:01 0201 02:01 0301 03:01 0401 04:01 >df 0101 0301 0201 0401 0101 0502 >dfnew 01:01 03:01 02:01 04:01 01:01 NA but what I want is: >dfnew2 01:01 03:01 02:01 04:01 01:01 0502 thanks again, Jill Jill Hollenbach wrote: > > Hi all, > I think this is a very basic question, but I'm new to this so please bear > with me. > > I'm using match to translate elements of a data frame using a lookup > table. If the content of a particular cell is not found in the lookup > table, the function returns NA. I'm wondering how I can just ignore those > cells, and return the original contents if no match is found in the lookup > table. > > Many thanks in advance, this site has been extremely helpful for me so > far, > Jill > > Jill Hollenbach, PhD, MPH > Assistant Staff Scientist > Center for Genetics > Children's Hospital Oakland Research Institute > jhollenb...@chori.org > -- View this message in context: http://www.nabble.com/how-to-have-%27match%27-ignore-no-matches-tp25756601p25757009.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.