| trmat {spatial} | R Documentation |
Evaluate trend surface over a grid.
trmat(obj, xl, xu, yl, yu, n)
obj |
object returned by surf.ls or surf.gls
|
xl |
limits of the rectangle for grid |
xu |
|
yl |
|
yu |
|
n |
use n x n grid within the rectangle
|
list with components x, y and z suitable for contour and image.
Ripley, B. D. (1981) Spatial Statistics. Wiley.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
data(topo, package="MASS") topo.kr <- surf.ls(2, topo) trsurf <- trmat(topo.kr, 0, 6.5, 0, 6.5, 50)