Neo4j

shan · 03-25-2020

Hi, I am seeing some strange behaviour in neo4j when I deal with null objects. I wonder if anyone can help me understand and justify this behaviour? Let's assume I set my parameter first using :params {b:null}. Then I run the following: MERGE (a:Test...

shan · 01-20-2020

I am going to replace algo.similarity.jaccard with the new algo.nodeSimilarity. In my experiments with nodeSimilarity I noticed that max, min, and mean are all -1.0 in the result. Then I wrote a query to actually calculate those values from the simil...

shan · 12-18-2019

I noticed that the triangleCount algorithm sometimes throws ArrayIndexOutOfBoundsException. This seems to be fixed in 3.5.13.0 and for that reason I moved to 3.5.13. But then noticed that now jaccard similarity algorithm sometimes throws ArithmeticEx...

shan · 03-25-2020

Thanks @intouch.vivek. I am afraid I don't follow. After the OPTIONAL MATCH, I have a row with two fileds, a and b where the value of b is null but a is not null. Now in WITH (b)-[*1..5]->(a) AND true as res, I am finding a path from b to a which is ...

shan · 03-19-2020

Thanks @jasperblues I am looking for a dataset that has some info about individual cases. Something you can analyze to maybe understand the pattern of how it spreads. The link I sent in my first reply does something like that.

shan · 03-18-2020

Thanks but isn’t this the same as the first dataset you shared in your first post?

shan · 03-18-2020

I wish there was a dataset of individual cases . Then we could maybe try to do something like this: co.vid19.sg Network Graph Visualisation of Coronavirus Outbreak Network graph visualising the outbreak, connections, edg...

shan · 02-25-2020

You can do this: MATCH (p:Product) WITH p, [x in keys(p) WHERE x CONTAINS 'formula' OR x =~ '(?i)formula(?i).*' | p[x]] as props RETURN * If you don't want to see rows where props is empty, you can add WHERE size(props) > 0 before RETURN *

Neo4j

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Path from a null object

algo.nodeSimilarity returns wrong min, max and mean in the result

Graph algorithms 3.5.13 source code

Re: Path from a null object

Re: COVID19 Data-sets

Re: COVID19 Data-sets

Re: COVID19 Data-sets

Re: Checking the value of the key and getting its value