Pass Java array as an input for ELKI DBSCAN

Question

I have been able to use ELKI for DBSCAN using Java code and its amazingly fast compared to any other tool. Till now I was working with a CSV file and using following to give that as an input.

params.addParameter(FileBasedDatabaseConnection.Parameterizer.INPUT_ID,fileLocation)

I am wondering how can I pass an array of (lat,long,timestamp) as an input instead of a CSV file. I am not able to figure it out.

Answer 1

Good morning.

This is what the class ArrayAdapterDatabaseConnection is for.

DatabaseConnection dbc = new ArrayAdapterDatabaseConnection(...);

// Pass an instance, not a class, as parameter.
params.addParameter(
    AbstractDatabase.Parameterizer.DATABASE_CONNECTION_ID, dbc);

Alternatively, you can implement your own DatabaseConnection or Parser.

When woring with latitude, longitude, timestamp be careful with distances and types. Do not use Euclidean distance on lat,long,timestamp; instead carefully construct a domain specific similarity measure.