[-VIRUS-] Re: [R] assert( condition )

Roger D. Peng rpeng at jhsph.edu
Tue Apr 6 21:27:57 CEST 2004

I often use stopifnot().


ivo welch wrote:
> hi R wizards:  I think it would be a good idea for me to use basic 
> argument checking (type, length) in function calls via an assert() like 
> function.  How do people usually do this?  Should I define my own 
> "assert()" function (or are there some predefined assertions)?  If I 
> write my own assert, is it possible to print out the R internal call 
> stack?  thanks.
> (?assert and google "assert R" and V+D index do not point me the right 
> way.)
> regards, /iaw
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