| methods.linnet {spatstat.linnet} | R Documentation |
Methods for Linear Networks
Description
These are methods for the class "linnet" of linear networks.
Usage
as.linnet(X, ...)
## S3 method for class 'linnet'
as.linnet(X, ..., sparse, maxsize=30000)
## S3 method for class 'linnet'
as.owin(W, ...)
## S3 method for class 'linnet'
as.psp(x, ..., fatal=TRUE)
## S3 method for class 'linnet'
nsegments(x)
## S3 method for class 'linnet'
nvertices(x, ...)
## S3 method for class 'linnet'
pixellate(x, ...)
## S3 method for class 'linnet'
print(x, ...)
## S3 method for class 'linnet'
summary(object, ...)
## S3 method for class 'linnet'
unitname(x)
## S3 replacement method for class 'linnet'
unitname(x) <- value
vertexdegree(x)
## S3 method for class 'linnet'
vertices(w)
## S3 method for class 'linnet'
volume(x)
## S3 method for class 'linnet'
Window(X, ...)
Arguments
x, X, object, w, W |
An object of class |
... |
Arguments passed to other methods. |
value |
A valid name for the unit of length for |
fatal |
Logical value indicating whether data in the wrong format
should lead to an error ( |
sparse |
Logical value indicating whether to use a sparse matrix
representation, as explained in |
maxsize |
Maximum permitted number of network vertices
(to prevent a system crash due to lack of memory)
when creating a network with |
Details
The function as.linnet is generic.
It converts data from some other format
into an object of class "linnet".
The method as.linnet.lpp extracts the linear network
information from an lpp object.
The method as.linnet.linnet converts a linear network
into another linear network with the required format.
The other functions are methods for the generic commands
as.owin,
as.psp,
nsegments,
nvertices,
pixellate,
print,
summary,
unitname,
unitname<-,
vertices,
volume
and Window
for the class "linnet".
The methods as.owin.linnet and Window.linnet
extract the window containing
the linear network, and return it as an object of class "owin".
The method as.psp.linnet extracts the
lines of the linear network as a line segment pattern (object of class
"psp") while nsegments.linnet simply counts the number
of line segments.
The method vertices.linnet extracts the vertices (nodes)
of the linear network and nvertices.linnet simply counts the
vertices. The function vertexdegree calculates
the topological degree of each vertex (the number of lines
emanating from that vertex) and returns these values as an integer
vector.
The method pixellate.linnet applies as.psp.linnet
to convert the network to a collection of line segments,
then invokes pixellate.psp.
Value
For as.linnet the value is an object of class "linnet".
For other functions, see the help file for the corresponding
generic function.
Author(s)
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
See Also
Generic functions:
as.owin,
as.psp,
nsegments,
nvertices,
pixellate,
print,
summary,
unitname,
unitname<-,
vertices,
volume
and Window.
Special tools: thinNetwork,
insertVertices,
joinVertices,
connected.linnet.
lixellate for dividing segments into shorter segments.
Examples
simplenet
summary(simplenet)
nsegments(simplenet)
nvertices(simplenet)
pixellate(simplenet)
volume(simplenet)
unitname(simplenet) <- c("cubit", "cubits")
Window(simplenet)