Re: [R-sig-Geo] geoR likfit: confusing AIC results?

respond to my question, and thank your for providing geoR to the R community. Cheers, Tim -- Timothy W. Hilton PhD Candidate, Department of Meteorology The Pennsylvania State University 503 Walker Building, University Park, PA 16802 hil...@meteo.psu.edu _

[R-sig-Geo] geoR likfit: confusing AIC results?

ure in fact may not. Am I misusing the AIC result from likfit to choose a covariance structure? I will greatly appreciate any advice the list can offer. A more detailed description of my experiment, code, and results follow below. many thanks, Tim -- Timothy W. Hilton PhD Candidate, Departm

[R-sig-Geo] maximum likelihood variogram parameter estimation, non-Euclidian distances

aware of an R geostats package that handles my situation? Many thanks! Tim -- Timothy W. Hilton PhD Candidate, Department of Meteorology The Pennsylvania State University 503 Walker Building, University Park, PA 16802 hil...@meteo.psu.edu ___ R-sig-Geo

[R-sig-Geo] plot.gstatVariogram - overlay multiple models on a single variogram

Hello, Using gstat, I would like to overlay several different variogram models onto a single empirical semivariogram. I am having trouble mastering the necessary lattice plotting commands. Using an example from this list (or maybe the docs for gstat; I'm not sure): mypanel = function(x,y,...) {

[R-sig-Geo] gstat::variogram - distance calculation is incorrect

Hello, I am trying to use 'variogram' from the gstat package to compute an empirical semivariogram for a dataset that spans the North American continent. I have been unable to get gstat to calculate the great circle distances correctly. For example, in the example below, the first two lines o

Re: [R-sig-Geo] gstat variogram & great circle distance

0 var1 > 5 1 893.0483 3.66061567 0 0 var1 > 6 1 992.9436 268.46555052 0 0 var1 > 7 4 1095.7359 83.25299050 0 0 var1 > 8 1 1274.4497 12.33954872 0 0 var1 > 9 1 1357.4796 3.01500925 0 0 var1 > > -- > Edzer >

Re: [R-sig-Geo] gstat variogram & great circle distance

0 0 var1 > 8 1 1274.4497 12.33954872 0 0 var1 > 9 1 1357.4796 3.01500925 0 0 var1 > > -- > Edzer > > > Timothy W. Hilton wrote: > >Hello, > > > >I am trying to use gstat to compute a semivariogram for data whose > >coor

[R-sig-Geo] gstat variogram & great circle distance

Hello, I am trying to use gstat to compute a semivariogram for data whose coordinates are latitude/longitude pairs. I would like to use the great circle distance between pairs. The documentation implies that gstat can do this, but I am not having any success. If anyone could suggest the corr