Hi. I was wondering which model you would tend to choose given similar
cross validation results.
1. An isotropic model with linear trend
2. An anisotropic model
Assume linear trend is ~x + y + I(x*y), where x,y are spatial coordinates.
I have read papers that argue that unless you know how to interpret the
linear trend (from a phyiscal/geographical/biological point of view) it
is better NOT to detrend the data prior to fitting a variogram. On the
other hand, one must ultimately assume stationarity. So I am not sure
which way to go. How do you decide?
Thanks,
Kerry
--
**********************
Kerry Ritter, Ph.D.
statistician
Southern California Coastal Water Research Project
3535 Harbor Blvd., Suite 110
work: 714-755-3210
cell: 714-420-3346
fax: 714-755-3299
email: ker...@sccwrp.org
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