[R] How can I get the difference seq directly?

Sat Nov 26 05:08:32 CET 2005

Hi, R-help,
let x<-rnorm(1000),
now I want to get a sequence y,which is satisfied with as follow:
 y[1]<-x[2]-x[1]
 y[2]<-x[3]-x[2]
 ....
 y[999]<-x[1000]-x[999]

Is there a function in R could achieve this requirement directly?

Thank you in advance!

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¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2005-11-26