Help with the ts function

What are you asking?  If you want to learn about times series in R, I 
suggest the following:

	  1.  Ch. 14 in Venables and Ripley (2002) Modern Applied Statistics 
with S, 4th ed. (Springer).  This may or may not answer your specific 
question.

	  2.  The article on "Date and Time Classes in R" by Gabor Grothendieck 
and Thomas Petzoldt (2004) in R News, 4-1: 29-32 (dowloadable from 
http://CRAN.R-project.org/doc/Rnews/).

	  3.  The "zoo" vignette in the "zoo" package.  A vignette provides 
both an Adobe Acrobat PDF document and a companion *.R file, which you 
can work through line by line, testing modifications, etc., as you go. 
This is my preferred way to learn about new capabilities in R.  If you 
are not familiar with vignettes, see 
"http://finzi.psych.upenn.edu/R/Rhelp02a/archive/67006.html".

	  hope this helps.
	  spencer graves
p.s.  I believe you will increase your average rate of knowledge 
acquisition about R if you read and follow the posting guide! 
"www.R-project.org/posting-guide.html".

I have a time series of temperature data recorded every 2 hours and I
would like to generate a spectrogram using the spectrum function that
examines cycles per day.  My statement for coding the series using the
ts function is

bevtemp<-ts(bevtemp,deltat=0.0833334) 

where 0.0833334 is 2 hours/24 hours.

I am wondering if this is the correct way to code the data?


Thanks for your help.

Gary Nelson.



************************************************************************
*
Gary A. Nelson
Massachusetts Division of Marine Fisheries
30 Emerson Avenue
Gloucester, MA 01930
Phone: (978) 282-0308 x114
Fax: (617) 727-3337
Email: Gary.Nelson at state.ma.us

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