neighborhood {igraph} | R Documentation |
These functions find the vertices not farther than a given limit from another fixed vertex, these are called the neighborhood of the vertex.
neighborhood.size(graph, order, nodes=V(graph), mode=c("all", "out", "in")) neighborhood(graph, order, nodes=V(graph), mode=c("all", "out", "in")) graph.neighborhood(graph, order, nodes=V(graph), mode=c("all", "out", "in")) connect.neighborhood(graph, order, mode=c("all", "out", "in", "total"))
graph |
The input graph. |
order |
Integer giving the order of the neighborhood. |
nodes |
The vertices for which the calculation is performed. |
mode |
Character constatnt, it specifies how to use the direction
of the edges if a directed graph is analyzed. For ‘out’ only
the outgoing edges are followed, so all vertices reachable from the
source vertex in at most |
The neighborhood of a given order o
of a vertex v
includes all vertices which are closer to v
than the
order. Ie. order 0 is always v
itself, order 1 is v
plus its immediate neighbors, order 2 is order 1 plus the immediate
neighbors of the vertices in order 1, etc.
neighborhood.size
calculates the size of the neighborhoods for
the given vertices with the given order.
neighborhood
calculates the neighborhoods of the given vertices
with the given order parameter.
graph.neighborhood
is creates (sub)graphs from all neighborhoods of
the given vertices with the given order parameter. This function
preserves the vertex, edge and graph attributes.
connect.neighborhood
creates a new graph by connecting each
vertex to all other vertices in its neighborhood.
neighborhood.size
returns with an integer vector.
neighborhood
returns with a list of integer vectors.
graph.neighborhood
returns with a list of graphs.
connect.neighborhood
returns with a new graph object.
Gabor Csardi csardi.gabor@gmail.com, the first version was done by Vincent Matossian
g <- graph.ring(10) neighborhood.size(g, 0, 1:3) neighborhood.size(g, 1, 1:3) neighborhood.size(g, 2, 1:3) neighborhood(g, 0, 1:3) neighborhood(g, 1, 1:3) neighborhood(g, 2, 1:3) # attributes are preserved V(g)$name <- c("a", "b", "c", "d", "e", "f", "g", "h", "i", "j") graph.neighborhood(g, 2, 1:3) # connecting to the neighborhood g <- graph.ring(10) g <- connect.neighborhood(g, 2)