sc_arc {silicate} | R Documentation |
Arc-node topology.
Description
Return a label and vertex count of each arc.
Usage
sc_arc(x, ...)
## Default S3 method:
sc_arc(x, ...)
## S3 method for class 'ARC'
sc_arc(x, ...)
Arguments
x |
input object |
... |
arguments for methods |
Details
Arcs are unbranched paths within the line segment graph. Nodes are the vertices where three or more arcs meet.
As with the PATH
and SC
models the arc id values will only be relevant when
those entities are identified and labelled. Running sc_arc
on a simple features model (for example) will
identify them and return a summary, but without having any record of what they refer to. Use ARC(x)
first to
work with models that don't included labels.
Value
a data frame with only the identities of the shared boundaries (arcs)
Examples
sc_arc(minimal_mesh)
ARC(minimal_mesh)[["arc"]]
arc <- ARC(minimal_mesh)
plot(arc)
points(arc$vertex[match(sc_node(arc)$vertex_, arc$vertex$vertex_), c("x_", "y_")])
arc <- ARC(polymesh)
plot(arc)
title("arcs and nodes")
points(arc$vertex[match(sc_node(arc)$vertex_, arc$vertex$vertex_), c("x_", "y_")])
[Package silicate version 0.7.1 Index]