Edges.
Simple binary relationships, a primitive composed of two vertices.
sc_edge(x, ...) ## Default S3 method: sc_edge(x, ...) ## S3 method for class 'PATH' sc_edge(x, ...) sc_start(x, ...) ## S3 method for class 'SC' sc_start(x, ...) ## S3 method for class 'SC0' sc_start(x, ...) ## S3 method for class 'PATH' sc_start(x, ...) ## S3 method for class 'PATH' sc_end(x, ...) ## S3 method for class 'PATH0' sc_start(x, ...) ## S3 method for class 'PATH0' sc_end(x, ...) ## S3 method for class 'ARC' sc_start(x, ...) ## S3 method for class 'TRI' sc_start(x, ...) sc_end(x, ...) ## S3 method for class 'SC' sc_end(x, ...) ## S3 method for class 'SC0' sc_end(x, ...) ## S3 method for class 'ARC' sc_end(x, ...) ## S3 method for class 'TRI' sc_end(x, ...)
x |
input object |
... |
arguments for methods |
Edges are unique, undirected line segments. Compare to sc_segment which refers to all
instances of edges.
sc_start and sc_end are convenience functions that provide the obvious
start and end coordinates by joining on the appropriate edge vertex label, .vx0
or .vx1. Currently this returns the ordered segments, along with their unique (unordered) edge_, as
well as unique segment, a object_ labels.
data frame of edge identity, or start/end coordinates
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