[R] extract certain values from a ts

[antonio rodriguez]

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 at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of antonio rodriguez
> Sent: Tuesday, October 24, 2006 1:57 PM
> To: r-help at 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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