R help - Jan 2012 - Autocorrelation values? How to extract?

Hi,

I am attempting to correct my models p-values due to temporal 
autocorrelations. It is not possible to model the correlation, so I have to 
make do with the p-value correction. I am feeling a bit thick here....I 
cannot get the autocorrelation values. What is the argument? 
My aim is to multiply the dependent variable autocorrelation with the 
independent variable autocorrelation and then multiply by (N-j)/N where N is 
the sample size and j is the lag...calculate z-value...adjust my 
p-value...Sincerely
Anna Zakrisson Braeunlich
PhD Student

Department of Systems Ecology
Stockholm University
Svante Arrheniusv. 21A
SE-106 91 Stockholm

E-mail: anna@ecology.su.se
Tel work: +46 (0)8 161103
Mobile: +46-(0)700-525015
Web site: ecology.su.se/staff/personal.asp?id=163
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Hi Anna,

I think you use acf() function to calculate the variable autocorrelation.
I'd do:

ac <- acf(y, lag.max = 100)$acf

Here, you use $acf, then you can extract the values only.

Best regards,
M?rcio Diniz
PhD Student

IME -  Mathematical and Statistics Institute
USP -  University - S?o Paulo

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