# linfun

0th

Percentile

##### Function on a Linear Network

Create a function on a linear network.

Keywords
spatial, math
##### Usage
linfun(f, L)
##### Arguments
f
A function in the Rlanguage.
L
A linear network (object of class "linnet") on which f is defined.
##### Details

This creates an object of class "linfun". This is a simple mechanism for handling a function defined on a linear network, to make it easier to display and manipulate.

f should be a function in the Rlanguage. It should be able to be called either in the form f(x,y) or f(x,y,seg,tp) where x,y are Cartesian coordinates of locations on the linear network, and seg, tp are the local coordinates. The function f should be vectorised: that is, if x and y are numeric vectors of the same length n, then v <- f(x,y) should be a vector of length n.

L should be a linear network (object of class "linnet") inside which the function f is well-defined.

##### Value

• It also belongs to the class "linfun" which has methods for plot, print etc.

as.lpp for a way to handle the coordinates x,y,seg,tp. methods.linfun for methods applicable to "linfun" objects.

distfun.lpp, nnfun.lpp.

• linfun
##### Examples
f <- linfun(function(x,y,seg,tp) { x+y }, simplenet)
plot(f)
Documentation reproduced from package spatstat, version 1.36-0, License: GPL (>= 2)

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