[R-sig-Geo] smothing surface/volume in 3D

2008-08-22 Thread Samuel Field
List, I have a set of locations in three dimensional space. Each location has a continously scaled attribute and I would like to shade or color the volume between these locations using a simple smoother. At the moment, I am simply using the cloud() function and coloring and sizing the points

[R-sig-Geo] Spatial Error Model - ANOVA table

2008-08-20 Thread Samuel Field
List, Is it possible to decompose the variance of an outcome into trend, signal and noise components using a SAR model - analogous to what one would get with an OLS model? This doesn't seem to be straight forward. With OLS, we decompose Y into two non-overlapping components Y = fit + error R-