fit.trend: Fit polynomial trend functions
Description
Fits a polynomial trend function to a point
object.
Similar to functions in B. Ripleys spatial library.
Usage
fit.trend(point.obj, at, np=2, plot.it=TRUE)
Arguments
at
name of dependent variable in point.obj
np
degree of polynom to be fitted
plot.it
switches generation of a contour plot
Value
- beta
- estimated parameters
...
References
http://www.gis.iastate.edu/SGeoStat/homepage.html