how about this: match(VAS,unique(VAS))
#or, preserving given order match(VAS,c("White","Yellow","Green","Black")) Cheers. Am 05.09.2015 um 23:14 schrieb Dan D: > # your data > VAS<-c("Green","Green","Black","Green","White","Yellow","Yellow","Black","Green","Black") > > # declare the new vector > New_Vector<-numeric(length(VAS)) > > # brute force: > New_Vector[VAS=="White"]<-1 > New_Vector[VAS=="Yellow"]<-2 > New_Vector[VAS=="Green"]<-3 > New_Vector[VAS=="Black"]<-4 > > # a little more subtle > cols<-c("White","Yellow","Green","Black") > for (i in 1:length(cols)) New_Vector[VAS==cols[i]]<-i > > # and a general approach (that may give a different indexing, but can be > used for any array) > for (i in 1:length(unique(VAS))) New_Vector[VAS==unique(VAS)[i]]<-i > cbind(1:length(unique(VAS)),unique(VAS)) # a decoding key for the color > index > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/Help-with-vectors-tp4711801p4711895.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. > -- Eik Vettorazzi Department of Medical Biometry and Epidemiology University Medical Center Hamburg-Eppendorf Martinistr. 52 20246 Hamburg T ++49/40/7410-58243 F ++49/40/7410-57790 -- _____________________________________________________________________ Universitätsklinikum Hamburg-Eppendorf; Körperschaft des öffentlichen Rechts; Gerichtsstand: Hamburg | www.uke.de Vorstandsmitglieder: Prof. Dr. Burkhard Göke (Vorsitzender), Prof. Dr. Dr. Uwe Koch-Gromus, Joachim Prölß, Rainer Schoppik _____________________________________________________________________ SAVE PAPER - THINK BEFORE PRINTING ______________________________________________ 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.