[R] Re: [S] subscripts error

Kenneth Cabrera krcabrer at epm.net.co
Fri Aug 1 12:43:21 CEST 2003

Hi Gianluca:

try :


Hope it helps.

Gianluca wrote:

> Hi all,
> I'm back to use S-Plus after a lot programming with SAS, so it's hard 
> for me to face many simple problems....
> Let's come to what is going to make me crazy. I have a simple 1000 obs 
> time series, called "x".
> If I want to compute second order differences just typing:
> x2<-x[1:length(x)-2]-x[3:length(x)]
> but I get the following error message:
> Error in x[1:length(x) - 2]: Only 0's may be mixed with negative 
> subscripts
> Much more interesting is that with first order differences it works 
> perfectly....
> Thanks in advance to all.
> Gianluca

Kenneth Roy Cabrera Torres
Celular +57 (315) 405 9339

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