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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/operators.R
\name{path}
\alias{path}
\title{Helper function to add or delete edges along a path}
\usage{
path(...)
}
\arguments{
\item{...}{See details below.}
}
\value{
A special object that can be used together with igraph
graphs and the plus and minus operators.
}
\description{
This function can be used to add or delete edges that form a path.
}
\details{
When adding edges via \code{+}, all unnamed arguments are
concatenated, and each element of a final vector is interpreted
as a vertex in the graph. For a vector of length \eqn{n+1}, \eqn{n}
edges are then added, from vertex 1 to vertex 2, from vertex 2 to vertex
3, etc. Named arguments will be used as edge attributes for the new
edges.
When deleting edges, all attributes are concatenated and then passed
to \code{\link{delete_edges}}.
}
\examples{
# Create a (directed) wheel
g <- make_star(11, center = 1) + path(2:11, 2)
plot(g)
g <- make_empty_graph(directed = FALSE, n = 10) \%>\%
set_vertex_attr("name", value = letters[1:10])
g2 <- g + path("a", "b", "c", "d")
plot(g2)
g3 <- g2 + path("e", "f", "g", weight=1:2, color="red")
E(g3)[[]]
g4 <- g3 + path(c("f", "c", "j", "d"), width=1:3, color="green")
E(g4)[[]]
}
\seealso{
Other functions for manipulating graph structure: \code{\link{+.igraph}},
\code{\link{add_edges}}, \code{\link{add_vertices}},
\code{\link{delete_edges}},
\code{\link{delete_vertices}}, \code{\link{edge}},
\code{\link{igraph-minus}}, \code{\link{vertex}}
}
\concept{functions for manipulating graph structure}
|
