| predict.trls {spatial} | R Documentation |
Predict method for trend surface fits
Description
Predicted values based on trend surface model object
Usage
## S3 method for class 'trls'
predict(object, x, y, ...)
Arguments
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. |
Value
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.
References
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
See Also
Examples
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")
[Package spatial version 7.3-17 Index]