neighbors
Neighbors of graph node
Syntax
Description
Examples
Neighboring Graph Nodes
Create and plot a graph, and then determine the neighbors of node 10
.
G = graph(bucky); plot(G)
N = neighbors(G,10)
N = 3×1
6
9
12
Input Arguments
G
— Input graph
graph
object
Input graph, specified as a graph
object. Use graph
to create an undirected graph object.
Example: G = graph(1,2)
nodeID
— Node identifier
node index | node name
Node identifier, specified as one of the values in this table.
Value | Example |
---|---|
Scalar node index | 1 |
Character vector node name | 'A' |
String scalar node name | "A" |
Example: N = neighbors(G,3)
Example: N = neighbors(G,'A')
Output Arguments
N
— Neighboring nodes
node indices | node names
Neighboring nodes, returned as node indices if nodeID
is numeric, or as node names if nodeID
is a node name. A
node that is connected to itself by an edge (a self-loop) is listed as its
own neighbor only once.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
The node identifier
nodeID
must be a scalar node index of the input graphG
. Node names are not supported.
Version History
Introduced in R2015bR2018a: Self-loop counting change
neighbors
counts self-loops only once. In previous releases,
if node u
had a self-loop, then neighbors(g,u)
listed u
twice in the output. neighbors(g,u)
now returns only one instance of u
.
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