1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
% Generated by roxygen2 (4.1.1): do not edit by hand
% Please edit documentation in R/interface.R
\name{add_edges}
\alias{add.edges}
\alias{add_edges}
\title{Add edges to a graph}
\usage{
add_edges(graph, edges, ..., attr = list())
}
\arguments{
\item{graph}{The input graph}
\item{edges}{The edges to add, a vertex sequence with even number
of vertices.}
\item{...}{Additional arguments, they must be named,
and they will be added as edge attributes, for the newly added
edges. See also details below.}
\item{attr}{A named list, its elements will be added
as edge attributes, for the newly added edges. See also details
below.}
}
\value{
The graph, with the edges (and attributes) added.
}
\description{
The new edges are given as a vertex sequence, e.g. internal
numeric vertex ids, or vertex names. The first edge points from
\code{edges[1]} to \code{edges[2]}, the second from \code{edges[3]}
to \code{edges[4]}, etc.
}
\details{
If attributes are supplied, and they are not present in the graph,
their values for the original edges of the graph are set to \code{NA}.
}
\examples{
g <- make_empty_graph(n = 5) \%>\%
add_edges(c(1,2, 2,3, 3,4, 4,5)) \%>\%
set_edge_attr("color", value = "red") \%>\%
add_edges(c(5,1), color = "green")
E(g)[[]]
plot(g)
}
\seealso{
Other functions for manipulating graph structure: \code{\link{+.igraph}};
\code{\link{-.igraph}}, \code{\link{igraph-minus}};
\code{\link{add.vertices}}, \code{\link{add_vertices}};
\code{\link{delete.edges}}, \code{\link{delete_edges}};
\code{\link{delete.vertices}},
\code{\link{delete_vertices}}; \code{\link{edge}},
\code{\link{edges}}; \code{\link{path}};
\code{\link{vertex}}, \code{\link{vertices}}
}
|
