trmat {spatial}R Documentation

Evaluate Trend Surface over a Grid

Description

Evaluate trend surface over a grid.

Usage

trmat(obj, xl, xu, yl, yu, n)

Arguments

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

Value

list with components x, y and z suitable for contour and image.

See Also

surf.ls, surf.gls

Examples

data(topo, package="MASS")
topo.kr <- surf.ls(2, topo)
trsurf <- trmat(topo.kr, 0, 6.5, 0, 6.5, 50)

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