Hi Robert, In your example, all of the numeric values are single digit. If this is the case in the real data, I think this will do:
# assume edf is the name of the data frame levels(edf$q_1_SQ009)<-c(levels(edf$q_1_SQ009),"0") edf$q_1_SQ009[is.na(edf$q_1_SQ009)]<-"0" get_first_char<-function(x) return(unlist(strsplit(as.character(x),""))[1]) edf$q_1_SQ009<-sapply(sapply(edf$q_1_SQ009,get_first_char),as.numeric) Jim On Sat, Sep 19, 2015 at 4:55 AM, sakko <sakko.s...@gmx.de> wrote: > Hi, > this is my first post in this forum and I am new to Ra. I am desperately > seeking for help. > > There is a data frame given in which I want to replace some values like > following: > > Existing data frame: > q_1_SQ009 > 1 4 > 2 <NA> > 3 3 > 4 2 > 5 5: Stimme voll und ganz zu > 6 4 > 7 4 > 8 2 > 9 1: Stimme überhaupt nicht zu > > Wanted data frame: > q_1_SQ009 > 1 4 > 2 0 > 3 3 > 4 2 > 5 5 > 6 4 > 7 4 > 8 2 > 9 1 > > This means that every "<NA>", "5: Stimme voll und ganz zu" and "1: Stimme > überhaupt nicht zu" shall be replaced by 0, 5, 1 > > > I beg you all for any help.... please > > Many thanks in advance > > > > Robert > > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/How-to-replace-strings-in-data-frames-by-condition-tp4712469.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.