outer.convhull

0th

Percentile

Version of outer which operates only in a convex hull

This version of outer evaluates FUN only on that part of the grid $cx x cy$ that is enclosed within the convex hull of the points (px,py). This can be useful for spatial estimation if no extrapolation is wanted.

Usage
outer.convhull(cx,cy,px,py,FUN,duplicate="remove",...)
Arguments
cx
x cordinates of grid
cy
y cordinates of grid
px
vector of x coordinates of points
py
vector of y coordinates of points
FUN
function to be evaluated over the grid
duplicate
indicates what to do with duplicate $(px_i,py_i)$ points, default "remove".
Value

  • Matrix with values of FUN (NAs if outside the convex hull).

See Also

in.convex.hull

Aliases
  • outer.convhull
Examples
x<-runif(20)
y<-runif(20)
z<-runif(20)
z.lm<-lm(z~x+y)
f.pred<-function(x,y)
  {predict(z.lm,data.frame(x=as.vector(x),y=as.vector(y)))$predictor}
xg<-seq(0,1,0.05)
yg<-seq(0,1,0.05)
image(xg,yg,outer.convhull(xg,yg,x,y,f.pred))
points(x,y)
Documentation reproduced from package tripack, version 1.0-1, License: R functions: GPL, Fortran code: available at netlib

Community examples

Looks like there are no examples yet.