##### Version of outer which operates only in a convex hull

This version of `outer`

evaluates `FUN`

only on that part of the grid \(cx\) times \(cy\) that is enclosed within
the convex hull of the points \((px,py)\).

This can be useful for spatial estimation if no extrapolation is wanted.

- Keywords
- spatial

##### 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"`

.- ...
additional arguments for

`FUN`

##### Value

Matrix with values of `FUN`

(`NA`

s if outside the
convex hull).

##### See Also

##### Examples

```
# NOT RUN {
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)))}
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 interp, version 1.0-33, License: GPL (>= 2)*

### Community examples

Looks like there are no examples yet.