Add one node label to a single node in a Neo4j® database, access the node, and then remove the new node label.

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 information for the updated node.

nodeinfo = searchNode(neo4jconn,labels);
node.NodeLabels

ans = 2×1 cell array
    {'Person' }
    {'Analyst'}

Remove the label Analyst from the updated node.

removeNodeLabel(neo4jconn,node,labels)

Find the first node again and display its node labels. The node now has only the label Person.

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

ans = 1×1 cell array
    {'Person'}

Close the database connection.

close(neo4jconn)

Add node labels to multiple nodes in a Neo4j® database, remove the new node labels, and 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.

nlabel = "Person";
nodeinfo = searchNode(neo4jconn,nlabel);

Add multiple node labels to the nodes in the database using the Neo4j database connection.

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

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

nlabel = "Analyst";
nodeinfo = searchNode(neo4jconn,nlabel);
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}

Remove the labels Analyst and Scientist from the updated nodes and display updated node information. Each node now has only the label Person. The nodeinfo output argument is a Neo4jNode object.

nodeinfo = removeNodeLabel(neo4jconn,node,labels);
nodeinfo.NodeLabels

ans = 7×1 cell array
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}
    {'Person'}

Close the database connection.

close(neo4jconn)