[R] Find the sign

[Rainer Schuermann]

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
> 
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if( sign( x ) == sign( y ) )