R help archive: Re: [R] extract certain values from a ts

Re: [R] extract certain values from a ts

From: antonio rodriguez <antonio.raju_at_gmail.com>
Date: Tue 24 Oct 2006 - 18:22:24 GMT

Leeds, Mark (IED) escribió:
> I don't think it matters whether it's a ts or a vector.
>
> WS<-WS[ ( WS > 5 ) & ( WS < 8 ) ]
>
> Check to make sure it works.
>

Dear Mark,

Yes it works. But I think that it matters for a ts since I want to know the days when those values where observed. The above solution gives me the number of days when those values were observed but not the days when they were observed. It is important to me to know if, for example, in april 1999, I had 3 periods with winds blowing below 8 m/s and over 5 m/s.

Best regards!

Antonio

>
> -----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch
> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of antonio rodriguez
> Sent: Tuesday, October 24, 2006 1:57 PM
> To: r-help@stat.math.ethz.ch
> Subject: [R] extract certain values from a ts
>
> Hi,
>
> Having several daily wind speed time series I want to extract those
> consecutive days over and below certain values (i.e. 5 < x <8) Don't
> know which funtion to use (aggregate, lapply?) and how to do it.
>
> Thanks in advance
>
> Antonio
>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed Oct 25 04:23:05 2006

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