doNearestNeighbor: Performs nearest neighbor interpolation

In MariekeDirk/GeoInterpolation: Temperature Interpolation methods

Description

Performs nearest neighbor interpolation

Usage

doNearestNeighbor(formula, data, newdata, debug.level = 1)

Arguments

formula	A formula to define the dependent and the independent variables, see the documentation of krige. Note that nearest neighbor does not support independent variables. Therefor, the formula should always have the form dependent~1.
data	The input data, should be a spatial object which supports coordinates extracting through coordinates()
newdata	A spatial object with the prediction locations.
debug.level	standard value set to 1
...	parameters that are passed on to Tps

Value

The function returns a spatial object with the same class as newdata with the prediction and the variance (NA in this case). The names of the columns match the outcome of the krige function.

Note

This functions uses idw with 'nmax' set to 1 to perform nearest neighbor interpolation.

Author(s)

Paul Hiemstra, [e-mail]

Examples

library(sp)
data(meuse)
coordinates(meuse) = ~x+y
data(meuse.grid)
gridded(meuse.grid) = ~x+y

meuse_nn = doNearestNeighbor(zinc~1, meuse, meuse.grid)

MariekeDirk/GeoInterpolation documentation built on May 14, 2019, 8:20 a.m.