thx to everyone for having listened to my suggestion and reasoning through it, even though it won't fly.
maybe, as a last word, let me add a short appeal that is more generic: R is a tough programming language for beginners. anything that allows a user to request additional error-checking, and/or that makes it easier and encourages users to write programs that check inputs would probably get widely used and be welcome by many. R libraries are useful, but it's not the same as having these sort of features in the base language. regards, /iaw ---- Ivo Welch (ivo.we...@gmail.com) http://www.ivo-welch.info/ J. Fred Weston Professor of Finance Anderson School at UCLA, C519 Director, UCLA Anderson Fink Center for Finance and Investments Free Finance Textbook, http://book.ivo-welch.info/ Editor, Critical Finance Review, http://www.critical-finance-review.org/ On Wed, Aug 21, 2013 at 6:56 AM, Geoff Jentry <geoffjen...@hexdump.org> wrote: >> first, I think it would be more useful if it had an optional character >> string, so users could write >> stopifnot( is.matrix(m), "m is not a matrix" ) > > > stop() allows for arbitrary strings .... ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
