[R] Averaging uneven measurements by time with uneven numbers of measurements

[Adele_Thompson at cargill.com]

Taking the final value for each 30-minute interval seems like it would get what I want. The problem is that sometimes this value would be 15 minutes before the end of the 30-minute interval. What would I use to pick up this value?

-----Original Message-----
From: ehlers at ucalgary.ca [mailto:ehlers at ucalgary.ca] 
Sent: Thursday, May 05, 2011 03:58 PM
To: Thompson, Adele - Adele_Thompson at cargill.com
Cc: r-help at r-project.org
Subject: Re: [R] Averaging uneven measurements by time with uneven numbers of measurements

On 2011-05-05 14:20, Schatzi wrote:
> I do not want smoothing as the data should have jumps (it is weight left in
> feeding bunker). I was thinking of maybe using a histogram-like function and
> then averaging that. Not sure if this is possible.

(It would be useful to include your original request - not everyone
uses Nabble.)

Actually, averaging *is* smoothing, but I suppose your intent is, for
some reason, not to smooth across 30-minute boundaries.

Perhaps you could use findInterval() to identify which measurements to
average.

Peter Ehlers

>
> -----
> In theory, practice and theory are the same. In practice, they are not - Albert Einstein
> --
> View this message in context: http://r.789695.n4.nabble.com/Averaging-uneven-measurements-by-time-with-uneven-numbers-of-measurements-tp3499337p3499386.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.