Example:
if (abs(-1-1) <= 3 & abs(1+1) <= 3) {print(1)} else {print(2)}



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On Fri, May 21, 2010 at 4:39 PM, Sarah Goslee <sarah.goslee@gmail.com>wrote:

> You need parentheses enclosing the entire if() statement:
>
> if(something & somethingelse) {
>   do this
> }
>
> Sarah
>
> On Fri, May 21, 2010 at 9:36 AM, Robert U <tacsunday@yahoo.fr> wrote:
> > Dear
> > R-users,
> >
> >
> >
> > I've been trying to write a script but i encounter much problems with
> basic
> > functions.. That is, i try to write a simple IF ELSE statement, with 2
> > requirements for the IF :
> >
> >
> >
> > if (abs(x + Dataset$LAT[1]) <= 3) and (abs(y + Dataset$LONG[1]) <= 3) {z
> > <- 1} else {z <-0}
> >
> >
> >
> > This does not work. So far i succeeded with one of tthe conditions :
> >
> >
> >
> > if (abs(x + Dataset$LAT[1]) <= 3) {z <- 1} else {z <-0}
> >> this work, so i tried to had the second condition with "and" or
> > "&" or even "& &&" as writen in operators
> > r-help but none of my trials works, it retrun "unexpected symbol
> > "{" ...
> >
> >
> >
> > any tip ?
> >
> >
> >
> >
> >
> > with regards
> >
> >
> >
> >
>
>
> --
> Sarah Goslee
> http://www.functionaldiversity.org
>
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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