Examples with LSQRResult org.apache.ignite.ml.math.isolve.lsqr.LSQRResult used on opensource projects

Example 1 with LSQRResult

use of org.apache.ignite.ml.math.isolve.lsqr.LSQRResult in project ignite by apache.

the class LinearRegressionLSQRTrainer method fit.

/**
 * {@inheritDoc}
 */
@Override
public LinearRegressionModel fit(DatasetBuilder<K, V> datasetBuilder, IgniteBiFunction<K, V, double[]> featureExtractor, IgniteBiFunction<K, V, Double> lbExtractor, int cols) {
    LSQRResult res;
    try (LSQROnHeap<K, V> lsqr = new LSQROnHeap<>(datasetBuilder, new LinSysPartitionDataBuilderOnHeap<>((k, v) -> {
        double[] row = Arrays.copyOf(featureExtractor.apply(k, v), cols + 1);
        row[cols] = 1.0;
        return row;
    }, lbExtractor, cols + 1))) {
        res = lsqr.solve(0, 1e-12, 1e-12, 1e8, -1, false, null);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    Vector weights = new DenseLocalOnHeapVector(Arrays.copyOfRange(res.getX(), 0, cols));
    return new LinearRegressionModel(weights, res.getX()[cols]);
}