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,
with formal arguments f(x,y,seg,tp)
or
f(x,y,seg,tp, ...)
where x,y
are
Cartesian coordinates of locations on the linear network,
seg, tp
are the local coordinates, and
...
are optional additional arguments.
The function f
should be vectorised: that is,
if x,y,seg,tp
are numeric vectors of the same length
n
, then v <- f(x,y,seg,tp)
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.
The result is a function g
in the Rlanguage which belongs to
the special class "linfun"
. This function
can be called as g(X)
where X
is an "lpp"
object,
or called as g(x,y)
or g(x,y,seg,tp)
where
x,y,seg,tp
are coordinates. There are several methods
for this class including print
, plot
and as.linim
.