JPMML-Biogeme

Java library and command-line application for converting Biogeme discrete choice models to PMML.

Installation

Enter the project root directory and build using Apache Maven:

mvn clean install

The build produces a library JAR file pmml-biogeme/target/pmml-biogeme-1.0-SNAPSHOT.jar, and an executable uber-JAR file pmml-biogeme-example/target/pmml-biogeme-example-executable-1.0-SNAPSHOT.jar.

Usage

A typical workflow can be summarized as follows:

1. Use Python to conduct a Biogeme experiment.
2. Construct a dict holding the Biogeme model and the Biogeme estimation results, and save it in pickle data format to a file in local filesystem.
3. Use the JPMML-Biogeme command-line application to turn the Pickle file to a PMML file.

The Python side of operations

Conducting a Biogeme experiment:

from biogeme.biogeme import BIOGEME
from biogeme.models import loglogit

import joblib

V, availability, Choice = scenario()

model = loglogit(V, availability, Choice)

# Save the model component
# The internal state of the model is modified during the BIOGEME.estimate() method call, rendering it un-pickleable later on
joblib.dump(model, "_model.pkl")

biogeme = BIOGEME(database, model)

results = biogeme.estimate()

# Save the estimation results component
joblib.dump(results, "_results.pkl")

Constructing a dict holding the Biogeme model and the Biogeme estimation results:

import joblib

experiment = {
	"model" : joblib.load("_model.pkl"),
	"results" : joblib.load("_results.pkl")
}

joblib.dump(experiment, "experiment.pkl")

The JPMML-Biogeme side of operations

Converting the Biogeme experiment Pickle file experiment.pkl to a PMML file experiment.pmml:

java -jar pmml-biogeme-example/target/pmml-biogeme-example-executable-1.0-SNAPSHOT.jar --pkl-input experiment.pkl --pmml-output experiment.pmml

Getting help:

java -jar pmml-biogeme-example/target/pmml-biogeme-example-executable-1.0-SNAPSHOT.jar --help

License

JPMML-Biogeme is licensed under the terms and conditions of the GNU Affero General Public License, Version 3.0.

If you would like to use JPMML-Biogeme in a proprietary software project, then it is possible to enter into a licensing agreement which makes JPMML-Biogeme available under the terms and conditions of the BSD 3-Clause License instead.

Additional information

JPMML-Biogeme is developed and maintained by Openscoring Ltd, Estonia.

Interested in using Java PMML API software in your company? Please contact info@openscoring.io