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supprise
1997 Oct 30
2
R-alpha: buglet in return(invisible()) [R 0.50 and 0.60]
Evaluate the following example to get the behavior :
--- anybody: patch ? ---
tst.i <- function(x)
{
if(missing(x))
return(invisible())
else if(!is.numeric(x)) stop("x must be numeric")
## else
invisible((x+3)^2)
}
tst.i()#-- should NOT print anything !!
print(mode(tst.i()))#--gives "NULL" both in S-plus 3.4 and R 0.60
tst.i(1)# nothing (ok in R and