[EMAIL PROTECTED] wrote:
> Full_Name: Stephanie MAHEVAS
> Version: 2.4.1
> OS: Windows NT
> Submission from: (NULL) (134.246.55.50)
>
>
>
> the two following instructions provide a synthax error :
>
> if ( 5 > 4 ) cat("ok1")
> else cat("ok2")
This is not a bug!
Since you are allowed to omit the else, R cannot know whether you want
to provide it and thinks you have finished, since
if ( 5 > 4 ) cat("ok1")
already is a valid and complete expression.
Therefore
else cat("ok2")
is a *new* expression which obviously is not valid without if() before.
If you want that R looks at the whole at first, either do as below or
make it a whole expression by putting it into braces as in:
{
if ( 5 > 4 ) cat("ok1")
else cat("ok2")
}
Uwe Ligges
> and
>
> if ( 5 > 4 ){ cat("ok1")}
> else cat("ok2")
>
> whereas these ones don't
>
> if ( 5 > 4 ) cat("ok1") else cat("ok2")
>
> and
>
> if ( 5 > 4 ){ cat("ok1")
> }else cat("ok2")
>
> It looks like a parser problem. If else is not on the same line as if or if
> the
> end of block statement of if } is not paste to else, else does not seem linked
> with if
>
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