Hi > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of chris201 > Sent: Friday, March 08, 2013 11:23 AM > To: r-help@r-project.org > Subject: [R] Substitute value > > Hi, > I have a large data frame and within this there is one column which > contains individual codes (eg. 1.1234.2a.2). I am splitting these > codes into their 4 components using strsplit (eg. "1", "1234", "2a", > "2"). However there are some individual codes which do not have a last > component (eg. 2.4356.3b. ), I want to give these codes a "1" as their > last component (eg. 2.4356.3b.1) but I can't get it to work. > > This is my example and attempt: > > sim.code<- > c("1.1234.1a.1","1.1234.1a.2","1.3245.2c.5","4.6743.3c.","4.3254.6b.4", > "3.5463.2a.") > sim.val<-c(4,5,3,6,4,7) > sim.df<-data.frame(sim.code,sim.val) > > sim.df$sim.code2<-sub(".$",".1",sim.df$sim.code) > sim.df > > but this changes all the ends to ".1"
It is not perfect solution but lll<-strsplit(sim.code, ".", fixed=T) gives you a list of splitted data index<-which(sapply(lll, length)==3) gives you values of list with only 3 elements after that some clever solution must exist but if the list is not big I would go further with for cycle for(i in index) lll[[i]] <-c(lll[[i]], 1) This put 1 in each empty slot of list lll. After that you cen either to put everything back by paste or do whatever you like. Regards Petr > > Thanks, > Chris > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Substitute- > value-tp4660699.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. ______________________________________________ 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.
