# Graph Algorithms

Is it possible to apply graph algorithms on a network which has more than one node type and links in the network?

Hi,

Yes you can. See this part of the documentation for an explanation of that - Graph Catalog - Neo4j Graph Data Science

Cheers, Mark

Dear Mark,

Thanks for that. I have had the opportunity to read your book on Graph Algorithms in Neo4J and Apache Spark. It has been of great help.

I asked the question because the attached below is the database schema for my dataset. Using the Graph Algorithm Playground App in Neo4J, I have been able to apply the measures such as Jaccard Similarity Index and coefficient clustering coefficients. Post that, I have applied centrality measures to compute node influence. I have made a note of the codes generated on using each of the methods.
So I am not sure if I am correct or not because the literature is just talking about networks with one kind of node and relationship. I was wondering if my analysis is correct or not. Any help or guidance would be much appreciated.

Maybe the use of graph database platforms allows me to do it?

Is there any mistake in using a schema with different node types and relationships and applying the graph algorithms on such a network?

The majority of our algorithms are intended for monopartite (meaning one node, one relationship type) graphs. You can use Cypher Projections to get the algorithms to run, but if you're combining node/relationship types the results may not be very informative. Instead, you want to use the cypher projection features to create a monopartite projection.

For example, you might want to try something like
`CALL algo.pageRank( 'MATCH (c:Company) RETURN id(c) as id', 'MATCH (c1:Page)-[r1]->(p)<-[r2]-(c2:Company) RETURN id(p1) as source, id(p2) as target, count(o) as weight', {graph:'cypher', weightProperty:'weight', write: true} )`