Arc-node topology.
Return a label and vertex count of each arc.
sc_arc(x, ...) ## Default S3 method: sc_arc(x, ...) ## S3 method for class 'ARC' sc_arc(x, ...)
x |
input object |
... |
arguments for methods |
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.
a data frame with only the identities of the shared boundaries (arcs)
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_")])Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.