R help - Nov 2005 - How can I get the difference seq directly?

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!



	

仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭佒伮
伬侎仯仭
 				

仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭伖併佇伹
仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭guangxing at ict.ac.cn
仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭2005-11-26

?diff

y <- diff(x)

HTH,

--sundar

 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!
> 
> 
> 
> 	
> 
> 
> 
>  				
> 
> 
> guangxing at ict.ac.cn
> 2005-11-26
> 
> 
> 
> ------------------------------------------------------------------------
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

Thank you very much.

I have tried as follow:
y<-x[2:length[x]]-x[1:(length[x]-1)]

apparently, it is not better than the "diff".

Thank you again.
======= 2005-11-26 12:19:32 伳侜佋佢伬伌佇伵佒佇佇伌伒伬仯伜======
>?diff
>
>y <- diff(x)
>
>HTH,
>
>--sundar
>
>伖併佇伹 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!
>> 
>> 
>> 
>> 	
>> 
>> 仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭佒伮
>> 伬侎仯仭
>>  				
>> 
>> 仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭伖併佇伹
>> 仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭guangxing at ict.ac.cn
>> 仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭2005-11-26
>> 
>> 
>> 
>>
------------------------------------------------------------------------
>> 
>> ______________________________________________
>> R-help at stat.math.ethz.ch mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>
= = = = = = = = = = = = = = = = = = = 			

仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭佒伮
伬侎仯仭
 
				 
仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭伖併佇伹
仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭guangxing at ict.ac.cn
仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭仭2005-11-26