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2008 Aug 05
4
LIDAR Problem in R (THANKS for HELP)
.... Best shape is from 135? 9. Fig 9- semi-variogram fit with Gaussian Model. R code is: > v = variogram(Z~X+Y, subground, cutoff=1800, width=200, alpha=c(135)) > v.fit = fit.variogram(v, vgm(psill = 1, model="Gau", range=1800, nugget= 0, anis=c(135, 0.5))) R code: testground2 <- read.table(file="c:/work_LIDAR_USA/R_kriging_new_set/ground_26841492694149_x yz.txt", header=T) class (testground2) coordinates (testground2)=~X+Y # this makes testground a SpatialPointsDataFrame class (testground2) str(as.data.frame(testground)) hist(testground$Z,nclass=20)...