Neo4j Graph Community

Unable to Load Sandbox

The sandbox does not respond to any of my inputs. I have switched browsers to Chrome and Safari, but the result is still the same.

Resolved! Weekly Challenge #2 Query Tuning

For this week's challenge, let's create a recommendations sandbox at sandbox.neo4j.com. This query returns the movie titles by a person who acted in the movies. We use the actorName parameter with the value "Clint Eastwood". Your starting Cypher is ...

Accessing Test predictions in link prediction pipeline

Hi, I was wondering if it would be at all possible to access the test predictions during the training phase of the link prediction pipeline to better understand the types of predictions the model is getting right and wrong. So I would like to b...

cypher lookup tables????

i am trying to build an iot project using neo4j just for training. I have a few iot devices that measure the concentration of air pollution gases and store these values on neo4j. I have build a cypher query and i received the following results as i w...

Simple GUI for basic data entry and structuring?

Is there a simple GUI with (say) drop-down selection lists, predictive text etc which allows the gradual building of a database by a db noob as he gradually learns neo4j, cypher, front-end web languages etc? Something like: Click "Create" (Node, type...

apoc periodic iterate succeeds but does not return anything

I expect some outright error on my part but request any help. Using apoc.periodic.iterate s per:call apoc.periodic.iterate("MATCH (a:DrugDrugX), (b:MeshDB)WHERE a.parentKey = b.parentKeyRETURN a,b","MERGE (a) - [r:DRUG_DRUG_MESH] -> (b)RETURN r",{bat...

How to fix "Cannot close the PageCache while files are still mapped"

The most common cause of this error is incorrect file permissions on the store files. While testing it is common for folks to start the database as different users, this can leave store files owned by other user ids. ( e.g. root )

Unable to write relationships using neo4j spark connector with spark 3.1.1

I am following the documentation to write relationships to aa neo4j db. I am able to write nodes but for relationships I get the following stack trace: 21/04/13 13:59:23 WARN SchemaService: Switching to query schema resolution 21/04/13 13:59:23 WARN ...

Why are my queries so slow..?

Hi there, I am currently working the first time with neo4j for my thesis. I am using Neo4j Community 4.4.10 and my server has 180 GB RAM. For my project I am using a dataset that is 200 GB big and nodes :e and their relationships. I am using the cyp...

Resolved! Error: Neo.ClientError.Procedure.ProcedureCallFailed LPA community detection relationship issue

Hi,I'm trying to project a graph in order to perform a Label Propagation LPA community detection algorithm and am coming up with this error: Failed to invoke procedure `gds.graph.project.cypher`: Caused by: java.lang.IllegalArgumentException: Failed ...

Spring Data Neo4j auditing - can it keep old data?

Hi,I need to implement some kind of auditing. I am using Spring Data Neo4j. I see it supports auditing, but it seems rather limited to me. Is it possible to keep old data with the auditing, like e.g. Envers does it? So I don't have to save old data m...

sum relationships in bloom

I’m new in neo4j and I need some help I have two nodes end relationship between them as invoice with invoice amount, there are a lot of invoices between two company-nodes, I need to summarize relationships amounts and use this syfer in bloom I tried ...

Neo4j Project in Humanities

I am proud to share with the community members that I submitted my DFG (Deutsche Forshungsgemeindschaft) application at the Free University Berlin. In the project Graph Database Analysis of the Trans-Adriatic Trade Records in the Kabužić Brothers’ Le...

Classification of nodes and normalization of path lengths

I am relatively new to Neo4j and graph databases. Maybe someone could help and steer me in the right direction. In general, we need a multi-label classification of nodes according to certain criteria/rules for creating a normalized reasoning mechani...

Resolved! Virtual nodes and properties

I want only a limited number of node properties to show in a graph, in a specific, non-alphabetical order. I was advised that this is not possible in standard graphs and that I needed to create virtual nodes.So I wrote this code: MATCH (p:Producer)-[...

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