[R] inconsistent behaviour of ifelse and if ... else

[Liaw, Andy]

When in doubt, check the doc first.  In this case, ?ifelse says in no fewer
than three places why what you described is intended and not a bug.

Andy

From: Joerg van den Hoff
> 
> is the behaviour
> 
> val <- ifelse(TRUE, numeric(0), 123)
> val  #NA
> 
> intended or is it a bug, i.e. should an empty object be returned as 
> might be expected(also in comparsion to what an explicit
> val <- {if(TRUE) numeric(0) else 123} yields)?
> 
> thanks,
> 
> joerg
> 
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