trmat: Evaluate Trend Surface over a Grid

Description Usage Arguments Value References See Also Examples

View source: R/kr.R

Description

Evaluate trend surface over a grid.

Usage

1
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.

References

Ripley, B. D. (1981) Spatial Statistics. Wiley.

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

See Also

surf.ls, surf.gls

Examples

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

Example output



spatial documentation built on May 29, 2017, 8 p.m.