Dear All I would need to generate differences between variates such as nam1<-nam2-nam3 in the following loop:
for(i in c("13","26","38")) { for (j in c("HR","PQ","QRS","QT")){ nam1<-paste("d",j,i,sep="") nam2<-paste(j,i,sep=".") nam3<-paste(j,"0",sep=".") cat(nam1,"\n") cat(nam2,"\n") cat(nam3,"\n") }} for example the first difference would be dHR13<-HR.13-HR.0 I have tried get(paste("d",j,i,sep=""))<-get(paste(j,i,sep="."))-get(paste(j,"0",sep=".")) which result in an error message such as "target of the assign does not belong to the language" (translation from French). I have looked in the FAQ but do not understand how to use assign in this context. Thanks for any help, Kind regards, Jean-Louis Dr. Jean-Louis Abitbol Directeur Recherche Clinique Trophos SA, Parc scientifique de Luminy, Case 931 Luminy Biotech Entreprises 13288 Marseille Cedex 9 Tel 04 91 82 82 73, Fax 04 91 82 82 89 Portable 06 24 47 59 34 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html