goodness of fit for anisotropic model in 4 directions
HI I am looking for a goodness of fit measure in the case of an anisotropic variogram model fit in 4 directions. I want to be able to compare between different fitting algorithms, so a measure that is independent of the fitting method is key. I also want to compare between different models (ie. anisotropic with linear trend vs anisotropic). Does anyone know if such a measure exists in one of the R libraries? Three seems to be a measure "SSErr" in gstat using fit.variogram that may work when all parameters are fixed, but I do not know how the statistic is calculated. Can someone provide me with a formula for this computation in the case of fitting a variogram in 4 directions? Alternatively can you help me with a different goodness of fit formula that I could program myself in R? 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: kerryr at sccwrp.org