[R-sig-Geo] fitting lag model in R
Hi all, can any one of you see whats wrong in the code below? model-lm(Tcrash~X100MVMT+Alcohol+Alignment+PVMT, data=data)#works sar-spautolm(Tcrash~X100MVMT+Alcohol+Alignment+PVMT,listw=WI_queenW, data=data)#works lag - lagsarlm(Tcrash~X100MVMT+Alcohol+Alignment+PVMT, data=data, listw=listwW)#shows error Error in solve.default(inf, tol = tol.solve) : system is computationally singular: reciprocal condition number = 2.44638e-12 lag - lagsarlm(Tcrash~X100MVMT+Alcohol+Alignment+PVMT, data=data, listw=WI_queenW) Error in solve.default(inf, tol = tol.solve) : system is computationally singular: reciprocal condition number = 1.51647e-13 WI_queenW Characteristics of weights list object: Neighbour list object: Number of regions: 71 Number of nonzero links: 364 Percentage nonzero weights: 7.22079 Average number of links: 5.126761 Weights style: B Weights constants summary: n nn S0 S1 S2 B 71 5041 364 728 8160 . Milan [[alternative HTML version deleted]] ___ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
[R-sig-Geo] back to variogram
Hello yet again: I have a little data set that I want to get a variogram for. However, I keep getting an error. str(z1.df) Formal class 'SpatialPointsDataFrame' [package sp] with 5 slots ..@ data :'data.frame':5 obs. of 1 variable: .. ..$ x: num [1:5] 1.4228 0.0275 -0.3738 0.2812 0.2328 ..@ coords.nrs : int [1:2] 2 3 ..@ coords : num [1:5, 1:2] 146.9 133.8 -85.8 -99.9 -91.1 ... .. ..- attr(*, dimnames)=List of 2 .. .. ..$ : NULL .. .. ..$ : chr [1:2] lon lat ..@ bbox : num [1:2, 1:2] -99.9 -31.3 146.9 38.3 .. ..- attr(*, dimnames)=List of 2 .. .. ..$ : chr [1:2] lon lat .. .. ..$ : chr [1:2] min max ..@ proj4string:Formal class 'CRS' [package sp] with 1 slots .. .. ..@ projargs: chr NA variogram(z1.df) Error in variogram.default(z1.df) : argument object and locations should be lists Does this make any sense, please? Thanks, Erin [[alternative HTML version deleted]] ___ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
[R-sig-Geo] function to convert 3D geographical coordinates to Cartesian?
Is there packaged code to convert geographical coordinates (e.g., longitude, latitude, elevation) to Cartesian coordinates in 3-space? The spherical-to-Cartesian math is straightforward enough, but there's certainly scope for error, so I'd prefer to use tested, previously-used code if available. TIA, Tom Roche tom_ro...@pobox.com ___ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
