This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

addNodeLabel

Add labels to nodes in Neo4j database

Syntax

addNodeLabel(neo4jconn,node,labels)
nodeinfo = addNodeLabel(neo4jconn,node,labels)

Description

example

addNodeLabel(neo4jconn,node,labels) adds node labels to one or more nodes in a Neo4j® database using a Neo4j database connection.

example

nodeinfo = addNodeLabel(neo4jconn,node,labels) returns updated node information as a Neo4jNode object for one node, or as a table for multiple nodes.

Examples

collapse all

Add one node label to a single node in a Neo4j® database and access the 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 =

     []

Retrieve the first node in the table of node information. This node has the label Person.

nlabel = "Person";
nodeinfo = searchNode(neo4jconn,nlabel);
node = nodeinfo.NodeObject(1);

Add one node label to a single node in the database using the Neo4j database connection.

labels = "Analyst";
addNodeLabel(neo4jconn,node,labels)

Display the node labels for the updated node. The NodeLabels property contains two labels.

nodeinfo = searchNode(neo4jconn,labels);
nodeinfo.NodeLabels
ans = 2×1 cell array
    {'Person' }
    {'Analyst'}

Close the database connection.

close(neo4jconn)

Add node labels to multiple nodes in a Neo4j® database. Access the updated node information using an output argument.

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 =

     []

Find nodes with the label Person, and display the node labels.

nlabel = "Person";
nodeinfo = searchNode(neo4jconn,nlabel);
nodeinfo.NodeLabels
ans = 7×1 cell array
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}

Add multiple node labels to the nodes in the database using the Neo4j database connection. The nodeinfo output argument is a Neo4jNode object.

node = nodeinfo.NodeObject;
labels = ["Analyst" "Scientist"];
nodeinfo = addNodeLabel(neo4jconn,node,labels);

Display the node information for the updated nodes. Each node has three node labels (Person, Analyst, and Scientist).

nodeinfo.NodeLabels
ans = 7×1 cell array
    {3×1 cell}
    {3×1 cell}
    {3×1 cell}
    {3×1 cell}
    {3×1 cell}
    {3×1 cell}
    {3×1 cell}

Close the database connection.

close(neo4jconn)

Input Arguments

collapse all

Neo4j database connection, specified as a Neo4jConnect object created with the function neo4j.

Node in a Neo4j database, specified as a Neo4jNode object, Neo4jNode object array, numeric scalar, or a numeric vector. For one node, specify a Neo4jNode object or a numeric scalar. For multiple nodes, specify a Neo4jNode object array or a numeric vector.

The numeric scalar or vector must contain Neo4j database node identifiers.

Example: 15

Example: [2,3,4]

Node labels, specified as a character vector, cell array of character vectors, string scalar, or string array. To specify one node label, use a character vector or string scalar. For multiple node labels, use a cell array of character vectors or a string array.

Example: "Person"

Data Types: char | string | cell

Output Arguments

collapse all

Node information in the Neo4j database, returned as a Neo4jNode object for one node or as a table for multiple nodes.

For multiple nodes, the table contains these variables:

  • NodeLabels — Cell array of character vectors that contains the node labels for each database node

  • NodeData — Cell array of structures that contains node information such as property keys

  • NodeObjectNeo4jNode object for each database node

The row names of the table are Neo4j node identifiers of each database node.

Introduced in R2019a