[R] Seven month time-series sampled at hourly intervals

Achim Zeileis Achim.Zeileis at wu-wien.ac.at
Fri Dec 2 13:16:42 CET 2005

On Fri, 02 Dec 2005 12:35:46 +0100 Henrik Andersson wrote:

> I have data from several sensors that recorded data at hourly
> intervals during seven months. I want to separate daily variation
> from the trend, and also be able to zoom in on only one month of data.
> I have not been able what functions to use, I can not figure out from 
> the help for 'ts' how to use hourly data.

You could use a "ts" series with frequency 24, corresponding to hours
within a day. Alternatively, you can use the "zoo" or "zooreg" class
from package zoo along with POSIXct time stamps (or some other
user-defined format). See the vignette of the zoo package for more

> I guess this is routine-work for a lot of people so I hope someone
> can point me in the right direction.
> ---------------------------------------------
> Henrik Andersson
> Netherlands Institute of Ecology -
> Centre for Estuarine and Marine Ecology
> P.O. Box 140
> 4400 AC Yerseke
> Phone: +31 113 577473
> h.andersson at nioo.knaw.nl
> http://www.nioo.knaw.nl/ppages/handersson
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