[EMAIL PROTECTED] writes: > Dear R users, > > Inspired by previous list discussion of the glob2rxc function, I am > attempting to create a new vector called TOTAL by summing all vectors > whose names begin with ABC: > > TOTAL = sum(list = ls(pattern = glob2rx("ABC*"))) > > I'm running R 2.2.1 on Windows XP. Can anyone say what I'm missing?
Probably, but I'll save the sarcasm... Consider this: > ls() [1] "as.alist.call" "f" "fire" [4] "Hgb" "perulung" "walk2" [7] "x" "y" "zelazo" > ls(pattern=glob2rx("f*")) [1] "f" "fire" > sum(list=ls(pattern=glob2rx("f*"))) Error in sum(..., na.rm = na.rm) : invalid 'mode' of argument which is because > sum(c("f","fire")) Error in sum(..., na.rm = na.rm) : invalid 'mode' of argument and has nothing to do with glob2rx, which is working fine. You may be looking for constructions like do.call("sum",lapply(ls(pattern=glob2rx("ABC*")), get))) or sum(unlist(lapply(ls(pattern=glob2rx("ABC*")), get))) -- O__ ---- Peter Dalgaard Ă˜ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ 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