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

[Clint Bowman]

In your first request for help you said, "How do I average the 
measurements by every 30 minutes?"  With 25000 readings over three 
days, it looks as if you are getting readings just about every 
second.

Okay, why don't you use the first reading as your initial weight, 
w0.  Then subtract each succeeding reading from that to obtain the 
amount of feed dispensed.  Now plot that value every 30 minutes.

If you are interested in the variation of feed dispensed over a 
half hour interval, that can be easily obtained by accummulating 
those half-hour readings.

-- 
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On Thu, 5 May 2011, 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.
>
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