Many thanks Dimitris.
On Mon, Jul 26, 2010 at 9:13 AM, Dimitris Rizopoulos <
d.rizopou...@erasmusmc.nl> wrote:
> have a look at function rollapply() from package zoo.
>
> I hope it helps.
>
> Best,
> Dimitris
>
>
> On 7/26/2010 8:28 AM, Raghu wrote:
>
>> Hi
>>
>> I have 3500 rows of data (say a single column) in a vector. If I want to
>> compare every ith element with the simple average of the previous (i-5)
>> elements, then I could write something like this:
>>
>> for(i in 6:NROW(data)){
>> if(data[i] => mean(data[(i-5):i]) (counter[i]=1)}
>> }
>>
>> Is it possible to replicate the above faster in R?
>>
>>
>>
> --
> Dimitris Rizopoulos
> Assistant Professor
> Department of Biostatistics
> Erasmus University Medical Center
>
> Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
> Tel: +31/(0)10/7043478
> Fax: +31/(0)10/7043014
>
--
'Raghu'
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