predict.trls {spatial}  R Documentation 
Predicted values based on trend surface model object
## S3 method for class 'trls': predict(object, x, y, ...)
object 
Fitted trend surface model object returned by surf.ls

x 
Vector of prediction location eastings (x coordinates) 
y 
Vector of prediction location northings (y coordinates) 
... 
further arguments passed to or from other methods. 
predict.trls
produces a vector of predictions corresponding
to the prediction locations. To display the output with image
or contour
, use trmat
or convert the returned vector
to matrix form.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
data(topo, package="MASS") topo2 < surf.ls(2, topo) topo4 < surf.ls(4, topo) x < c(1.78, 2.21) y < c(6.15, 6.15) z2 < predict(topo2, x, y) z4 < predict(topo4, x, y) cat("2nd order predictions:", z2, "\n4th order predictions:", z4, "\n")