[R] I think this is a bug

[Thomas Lumley]

On Tue, 18 Jul 2006, Xavier Barron wrote:

> Hello!
>
> I work with:
>
> R : Copyright 2006, The R Foundation for
> Statistical Computing
> Version 2.3.1 (2006-06-01)
>
> On Windows XP Professional (Version 2002) SP2
>
> I think there is a bug in the conditional
> execution if (expr1) {expr2} else {expr3}
>
> If I try:
>
> "if (expr1) expr2 else expr3"
>
> it works well but when I put the expression expr2
> and expr3 between {} I receive an error message
> like this one:


It's not a bug. You need the } on the same line as the else

if (expr1){
   expr2
} else {
   expr3
}

as otherwise R doesn't know there is going to be an 'else'.

 	-thomas


> "Erreur dans parse(file, n = -1, NULL, "?") :
> erreur de syntaxe à la ligne
> 4:      }
> 5:      else"
>
> ...which translated in english gives:
>
> "Error in parse(file, n = -1, NULL, "?") : syntax
> error at the line
> 4:      }
> 5:      else"
>
> Maybe, there is something I don't understand. I
> should be very grateful if you would help me to
> solve this issue.
>
> Best regards,
>
> Xavier
>
> ___________________________
> Xavier Barron
> 20, rue de la Pierre Levée
> 75011 Paris
> 0143381141 / 0675062109
>
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Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle