[Rd] Extending suggestion for stopifnot

[ivo welch]

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.welch at 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 <geoffjentry at 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 ....