This isn't really a finance-specific question, so it should probably go to
the general r-help list. But I like

sign(x) == sign(y)

On Mon, Jan 24, 2011 at 10:58 AM, Lui ## <lui.r.project@googlemail.com>wrote:

> ...or
> if( (x*y) > 0 ){ }
>
> Regards
> Lui
>
> On Mon, Jan 24, 2011 at 1:27 PM, Rainer Schuermann
> <Rainer.Schuermann@gmx.net> wrote:
> > On Monday, January 24, 2011 07:18:03 pm Alaios wrote:
> >> Hello :)
> >> I wanted to right an expression to check when x and y have the same sign
> >> and I wrote the following:
> >>
> >>  if ((x<0 && y<0) || (x>0 && y>0))
> >>
> >> which looks pretty ugly to me.
> >>
> >> Can you please suggest me a better way for that?
> >>
> >> Regards
> >> Alex
> >>
> >> ______________________________________________
> >> R-help@r-project.org mailing list
> >> 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.
> >>
> >
> >
> > if( sign( x ) == sign( y ) )
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > 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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