triCube {EGRET} | R Documentation |
Tricube weight function
Description
Computes the tricube weight function on a vector of distance values (d), based on a half-window width of h, and returns a vector of weights that range from zero to 1.
Usage
triCube(d, h)
Arguments
d |
numeric vector of distances from the point of estimation to the given sample value |
h |
numeric value, the half-window width, measured in the same units as d |
Details
See Cleveland, W. S. (1979). Robust locally weighted regression and smoothing scatterplots, JASA, 74, 829-836
Value
w numeric vector of weights, all 0<=w<=1
Examples
h<-10
d<-c(-11,-10,-5,-1,-0.01,0,5,9.9,10,20)
triCube(d,h)
[Package EGRET version 3.0.9 Index]