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

[Sundar Dorai-Raj]

?diff

y <- diff(x)

HTH,

--sundar

å¹¿æ˜Ÿ wrote:
> 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!
> 
> 
> 
> 	
> 
> ã€€ã€€ã€€ã€€ã€€ã€€ã€€ã€€è‡´
> ç¤¼ï¼
>  				
> 
> ã€€ã€€ã€€ã€€ã€€ã€€ã€€ã€€å¹¿æ˜Ÿ
> ã€€ã€€ã€€ã€€ã€€ã€€ã€€ã€€guangxing at ict.ac.cn
> ã€€ã€€ã€€ã€€ã€€ã€€ã€€ã€€ã€€ã€€2005-11-26
> 
> 
> 
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