/*
* Copyright (c) 2015 Villu Ruusmann
*
* This file is part of JPMML-SkLearn
*
* JPMML-SkLearn is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JPMML-SkLearn is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with JPMML-SkLearn. If not, see <http://www.gnu.org/licenses/>.
*/
package sklearn.linear_model;
import java.util.List;
import com.google.common.collect.Iterables;
import org.dmg.pmml.MiningFunction;
import org.dmg.pmml.regression.RegressionModel;
import org.jpmml.converter.ModelUtil;
import org.jpmml.converter.Schema;
import org.jpmml.converter.ValueUtil;
import org.jpmml.converter.regression.RegressionModelUtil;
import org.jpmml.sklearn.ClassDictUtil;
import sklearn.Regressor;
abstract
public class BaseLinearRegressor extends Regressor {
public BaseLinearRegressor(String module, String name){
super(module, name);
}
@Override
public int getNumberOfFeatures(){
int[] shape = getCoefShape();
return shape[0];
}
@Override
public RegressionModel encodeModel(Schema schema){
List<? extends Number> coef = getCoef();
List<? extends Number> intercept = getIntercept();
RegressionModel regressionModel = new RegressionModel(MiningFunction.REGRESSION, ModelUtil.createMiningSchema(schema), null)
.addRegressionTables(RegressionModelUtil.createRegressionTable(schema.getFeatures(), ValueUtil.asDouble(Iterables.getOnlyElement(intercept)), ValueUtil.asDoubles(coef)));
return regressionModel;
}
public List<? extends Number> getCoef(){
return (List)ClassDictUtil.getArray(this, "coef_");
}
public List<? extends Number> getIntercept(){
return (List)ClassDictUtil.getArray(this, "intercept_");
}
private int[] getCoefShape(){
return ClassDictUtil.getShape(this, "coef_", 1);
}
}