[brodgar]Re: DFA example

[brodgar@lists.highstat.com]

At 20:29 28/02/2007, Koen-Alonso, Mariano wrote:
>Hi Alain, Hi everybody,
>I am a brand-new user of Brodgar, and my apologies in advance if my 
>question is trivial.
>I am still exploring the software and digging into the manual and 
>online examples, but found something that looks odd.


Koen,
I am not sure but it could be the case that the owner of the data 
gave me two years of extra data at a later stage, and that we 
uploaded those data. The DFA is also applied on the same data in 
Chapter 17 of Zuur, Ieno and Smith (2007), Analysing Ecological data 
(available in about 3-4 weeks).

The full data are analysed in chapter 17, and give:


V Diagonal      V Non-diagonal
Explanatory variables   AIC             Number of 
trends        Explanatory variables   AIC
-       850.951         1       -       778.537
-       755.427         2       -       769.933
-       749.387         3       -       764.764
-       757.197         4       -       773.499

NAO     858.911         1       NAO     778.139
NAO     757.998         2       NAO     770.916
NAO     750.483         3       NAO     764.483
NAO     757.458         4       NAO     770.519


I have attached the full data, as used in the book, in a separate 
email. Give a shout if you don't manage to get it sorted.

Alain




Dr. Alain F. Zuur
First author of:

Analysing Ecological Data (2007).  Zuur, AF, Ieno, EN and Smith, GM. 
Springer. 680 p.
URL: www.springer.com/0-387-45967-7

Analysing Ecological data using GLMM and GAMM in R. (2008). Zuur, AF, 
Ieno, EN, Walker, N and Smith, GM
Springer.

Other books: http://www.brodgar.com/books.htm

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