spatial: trmat – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

trmat

Evaluate Trend Surface over a Grid

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)

Functions for Kriging and Point Pattern Analysis

v7.3-14

GPL-2 | GPL-3

Authors

Brian Ripley [aut, cre, cph], Roger Bivand [ctb], William Venables [cph]

Initial release

2021-04-17