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...ingle xy plot of two separate (but similar in values and ranges). Full code follows, xyplot code at bottom #########Determine Frequencies ##########coastal_slope #needs the maptools package to read ESRI grid require(maptools) #import the flow slope grid basin.map <- readAsciiGrid("C:/R_PLots/coastal_slp.asc", colname="slope") basin_slope <- (basin.map$slope) #read the slopes into a dataframe freqs<-as.data.frame(table(basin_slope)) #rank the frequencies based on each unique occerence, note, ranks from 1 to n r<-rank(freqs$basin_slope) n<-length(r) #determing...

...es90.vgm<-variog(trees.geo,max.dist=100,direction=pi/2) > plot(trees90.vgm) The second is a plot of a multidirectional variogram created using variog4: > trees.vgm4<-variog4(trees.geo,max.dist=100) > plot(trees.vgm4) The graphs are also available at: www.tiem.utk.edu/~mmfuller/R_plots.pdf You can see that the 90 degree line in the multi-line plot from variog4 (dotted green line) does not include all the data shown in the single 90 degree variogram (circles) plotted using variog. The lines for other directions in the variog4 plot are also incompletely drawn. Any sugges...