methods.linnet
Methods for Linear Networks
These are methods for the class "linnet" of linear networks.
Usage
as.linnet(X, ...)## S3 method for class 'linnet':
as.linnet(X, ..., sparse)
## S3 method for class 'linnet':
as.owin(W, ...)
## S3 method for class 'linnet':
as.psp(x, ..., fatal=TRUE)
## S3 method for class 'linnet':
print(x, ...)
## S3 method for class 'linnet':
pixellate(x, ...)
## S3 method for class 'linnet':
summary(object, ...)
## S3 method for class 'linnet':
unitname(x)
## S3 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
"linnet"representing a linear network. - ...
- Arguments passed to other methods.
- value
- A valid name for the unit of length for
x. Seeunitname. - fatal
- Logical value indicating whether data in the wrong format
should lead to an error (
fatal=TRUE) or a warning (fatal=FALSE). - sparse
- Logical value indicating whether to use a sparse matrix
representation, as explained in
linnet. Default is to keep the same representation as inX.
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 other functions are methods for the generic commands
as.owin,
as.psp,
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").
The method vertices.linnet extracts the vertices (nodes)
of the linear network. 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.linnetthe value is an object of class"linnet". For other functions, see the help file for the corresponding generic function.
See Also
Examples
simplenet
summary(simplenet)
volume(simplenet)
unitname(simplenet) <- c("cubit", "cubits")
Window(simplenet)