[R] stopifnot message mutation

[Charles C. Berry]

On Fri, 15 Aug 2008, Vadim Organovich wrote:

> Dear R-users,
>
> Could someone please explain why the message printed by function stopifnot2, see below, is different from that of stopifnot itself?


Refer to the source

 	page(stopifnot,'print')

Then consider this:

> foo <- function(...) match.call()
> foo2 <- function(...) foo(...)
> foo(a+b)[[2]]
a + b
> foo2(a+b)[[2]]
..1
>


HTH,

Chuck


>
> Thank you for your help,
> Vadim
>
>
>> stopifnot2 <- function(...) stopifnot(...)
>> stopifnot(F)
> Error: F is not TRUE
>> stopifnot2(F)
> Error: ..1 is not TRUE
>
>> version
>               _
> platform       i386-pc-mingw32
> arch           i386
> os             mingw32
> system         i386, mingw32
> status
> major          2
> minor          6.1
> year           2007
> month          11
> day            26
> svn rev        43537
> language       R
> version.string R version 2.6.1 (2007-11-26)
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901