on Oct 9, 2014 in import
You might have data as CSV files to create nodes and relationships from in your Neo4j Graph Database.
It might be a lot of data, like many tens of million lines.
Too much for LOAD CSV to handle transactionally.
Usually you can just fire up my batch-importer and prepare node and relationship files that adhere to its input [...]
on Jun 25, 2014 in cypher
You can also read an interactive and live version of this blog post as a Neo4j GraphGist.
Since version 2.1 Neo4j provides out-of-the box support for CSV ingestion. The LOAD CSV command that was added to the Cypher Query language is a versatile and powerful ETL tool.
It allows you to ingest CSV data from any URL [...]
on Jun 23, 2014 in cypher
I never heard of UbiGraph before, but this tweet by @a61dr41n made me curious.
#ubigraph is an excellent #visualisation package for #neo4j and other #GraphDB can't believe I haven't heard of it sooner…
— a61dr41n (@a61dr41n) June 20, 2014
So I checked it out. UbiGraph is a graph rendering server that is controlled remotely and also interactively with [...]
During the awesome GeekOut conference organized by my friends at ZeroTurnaround I was asked to stand in for Tim Fox who couldn’t come.
So instead of using a existing presentation I decided to finally write one up over night that covers one aspect of graph databases that is close to my heart:
Software Analytics with Graphs
When I [...]
on Jun 3, 2014 in neo4j
Styling Neo4j Server Visualisation
To give you a head start when using Neo4j-Browser I wanted to share these quick tips for styling and querying.
on Jun 1, 2014 in cypher
In this blog post, I want to show the power of LOAD CSV, which is much more than just a simple data ingestion clause for Neo4j’s Cypher.
I want to demonstrate how easy it is to use by importing a project’s git commit history into Neo4j. For demonstration purposes, I use Neo4j’s repository on GitHub, which [...]
on Apr 10, 2014 in cypher
Sometimes you don’t see the forest for the trees. But if you do, you probably use a graph database.
Trees are one of the simple graph datastructures, directed acyclic graphs (DAGs).
For our example we use a time-tree that we want to import into the database.
A quick soulver script (thanks Mark) later, we know how [...]
on Mar 25, 2014 in cypher
After reading the interesting blog post of my colleague Rik van Bruggen on “Media, Politics and Graphs” I thought it would be really cool to render it as a GrapGist. Especially, as he already shared all the queries as a GitHub Gist.
Unfortunately the dataset was a bit large for a sensible GraphGist representation, so I [...]
on Mar 21, 2014 in cypher
We want to run some test queries on an existing graph model but have no sample data at hand and also no input files (CSV,GraphML) that would provide it.
Why not create quickly it on our own just using cypher. First I thought about using Cypher to generate CSV files and loading them back, but it [...]