Dear All My program is long and sorry I do not have a replicable set of codes to present. But I present a chunk of codes at the end below. Essentially,
1. I initialize cat.ref as NUL (see line 1) 2. Then, I repeatedly add elements to cat.ref, where each element include parentheses in double quotations (see line 2). I had expected cat.ref to eventually contain the list dilemma1(ref),scigrn1(ref),... Not so, I end up getting the following (see first column; not in parentheses, like (ref.)). dilemma1.ref.. 22.356 2.619 8.535 0.000 *** scigrn1.ref.. 22.474 2.697 8.334 0.000 *** Any idea how I might revise lines like the following (first line below): dv.group<-c("dilemma2","dilemma3"); cat.ref<-"dilemma1(ref.)" etc. Thanks. ap0<-zx.ref<-NULL dv.group<-c("dilemma2","dilemma3"); cat.ref<-"dilemma1(ref.)" if(any(dv.group%in%jindex)){ v<-pred0(dv.group,cat.ref) ap0<-rbind(ap0,v$ap0); zx.ref<-c(zx.ref,v$cat.ref) } dv.group<-c("scigrn2","scigrn3"); cat.ref<-"scigrn1(ref.)" if(any(dv.group%in%jindex)){ v<-pred0(dv.group,cat.ref) ap0<-rbind(ap0,v$ap0); zx.ref<-c(zx.ref,v$cat.ref) } [[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.