nodeDegree

In-degree and out-degree for each associated relationship type for Neo4j database node

Syntax

degree = nodeDegree(node,direction)

Description

degree = nodeDegree(node,direction) returns the in- or out-degree for each relationship for the specified Neo4jNode object. direction specifies the relationship direction.

Examples

Search Node Degree for Node

Create a Neo4j® database connection using the URL http://localhost:7474/db/data, user name neo4j, and password matlab.

url = 'http://localhost:7474/db/data';
username = 'neo4j';
password = 'matlab';
neo4jconn = neo4j(url,username,password);

Check the Message property of the Neo4j® connection object neo4jconn. The blank Message property indicates a successful connection.

neo4jconn.Message

ans =

     []

Search the database for the node with node identifier 2 using the Neo4j® database connection neo4jconn.

nodeid = 2;
node = searchNodeByID(neo4jconn,nodeid);

Search for the degree of all incoming relationships for the node. degree returns a structure with the in-degree for each relationship type.

degree = nodeDegree(node,'in')

degree = struct with fields:
    knows: 1

Close the database connection.

close(neo4jconn)

Input Arguments

node — Neo4j^® database node

Neo4jNode object

Neo4j database node, specified as a Neo4jNode object created using searchNode or searchNodeByID.

direction — Relationship direction

'in' | 'out'

Relationship direction, specified as either 'in' for an incoming relationship or 'out' for an outgoing relationship. The relationships are associated with the specified origin node.

Output Arguments

degree — In- or out-degree

structure

In- or out-degree, returned as a structure. Each field in the structure represents either incoming or outgoing relationship types. If there are no incoming or outgoing relationship types, the structure is empty.