I dont know about correlogram, but you can create a variogram map using gstat package. A from there you can see spatial variation and direction of this variation...
Matevz U. Pavlic On 13. jul. 2011, at 14:16, "Sadz A" <sadz_a1...@yahoo.co.uk> wrote: > Dear list, > > I am trying to explore spatial patterns in some density data that I have > (attached txt- RDdensityChange). I have successfully carried out Moran's I > correlogram on the data using the library (pgirmess). I now wish to carry out > an anisotropic correlogram, I have looked at the ncf and ape packages but I > am failing to get the out put I want: > > I would like to find the direction in which the change is occurring, how > significant it is etc. > > To do this I believe I need to calculate the distance between points > (municipXY.txt attached is the latitude longitude location of my data points) > when they are projected onto a perpendicular line (of angle 0 ie. north > line). use the distances calculated to to run a new morans I. And then repeat > for a new angle (eg 45 degrees (North east), 90 degrees (east) etc). > > Unfortunately I don't know how to do this, I am very new to spatial analysis > and R. > I would greatly appreciate any help on this matter. > > Thank you for your time, > S. > <RDdensityChange.txt> > <municipXY.txt> > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
