[R-sig-eco] Best package for time lags?

[Richard L. Boyce]

Hi folks,

I'm on my second year of a project involving tree and shrub 
transpiration in a wetland forest in Kentucky.  Since it's a wetland 
forest, transpiration is rarely affected by water availability and is 
mostly driven by vapor pressure deficit (vpd).  I've been regressing 
daily transpiration vs. vpd, and it's usually a good fit.  However, I 
suspect their are some time lags, namely that transpiration may be 
responding to vpd not just from the current day but also previous 
days.

I've done a quick pass through various R packages, and there are 
several that model time lags.  Can anyone make some recommendations 
for a beginner?  Thanks!
-- 
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Richard L. Boyce
Associate Professor
Department of Biological Sciences
Northern Kentucky University
Nunn Drive
Highland Heights, KY  41099  USA

859-572-1407 (tel.)
859-572-5639 (fax)
boycer at nku.edu
http://www.nku.edu/~boycer/
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"One of the advantages of being disorderly is that one is constantly 
making exciting discoveries." - A.A. Milne