Machine Learning Feature Engineering
- Website: https://collectivemedia.github.io/modelmatrix/
- Source: https://github.com/collectivemedia/modelmatrix/
Alternative to Spark machine learning pipeline feature extractors, focused on building sparse feature vectors.
Where to get it
Model Matrix workflow focused around command line interface, however you can use client library to apply model matrix transformations to DataFrame in your application.
To get the latest version of the model matrix, add the following to your SBT build:
resolvers += "Collective Media Bintray" at "https://dl.bintray.com/collectivemedia/releases"
And use following library dependencies:
libraryDependencies += "com.collective.modelmatrix" %% "modelmatrix-client" % "0.0.1"
Local PostgreSQL database required for integration tests
Modelmatrix can either use H2 or Postgres as databases.
modelmatrix-cli is configured to use Postgres database by default. The database configuration is located in
url = "jdbc:postgresql://localhost/modelmatrix" user = "modelmatrix" password = "modelmatrix"
modelmatrix-core unit and integration tests are configured to use H2 (in memory):
- Integration test databse configuration is located:
- Unit test database configuration is located:
N.B.: DATABASE_TO_UPPER=FALSE setting is required for H2 because of compatibility issues between Flyway and Slick
Schema migrations managed by Flyway,
If you want to add test that excepect modelmatrix matrix schema and tables to be present please implement trait
Unit and Integration test are automatically creating/updating schema and using by default H2
sbt test sbt it:test
If you want to test against Postgres you can overwrite the database file-based configuration by running sbt with the following runtime system properties:
sbt -Dmodelmatrix.catalog.db.url="jdbc:postgresql://localhost/modelmatrix?user=modelmatrix&password=modelmatrix" -Dmodelmatrix.catalog.db.driver="org.postgresql.Driver" test sbt -Dmodelmatrix.catalog.db.url="jdbc:postgresql://localhost/modelmatrix?user=modelmatrix&password=modelmatrix" -Dmodelmatrix.catalog.db.driver="org.postgresql.Driver" it:test
N.B. This will require you to have Postgres running locally with schema
modelmatrix created and owned by user
Assembling CLI application
To run CLI you need to build application distribution first (zip or tar.gz)
sbt universal:packageBin sbt universal:packageXzTarball
Application will be packaged in
This repository workflow is based on A successful Git branching model with two main branches with an infinite lifetime:
The master branch at origin should be familiar to every Git user. Parallel to the master branch, another branch exists called develop.
We consider origin/master to be the main branch where the source code of HEAD always reflects a production-ready state.
We consider origin/develop to be the main branch where the source code of HEAD always reflects a state with the latest delivered development changes for the next release. Some would call this the “integration branch”. This is where any automatic nightly builds are built from.
Further details are available in A successful Git branching model blog post.