predict.trls {spatial}R Documentation

Predict method for trend surface fits


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
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.

See Also, trmat


data(topo, package="MASS")
topo2 <-, topo)
topo4 <-, 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")

[Package spatial version 7.2-33 Index]