org.carrot2.matrix.factorization.IIterativeMatrixFactorization Maven / Gradle / Ivy

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/*
 * Carrot2 project.
 *
 * Copyright (C) 2002-2019, Dawid Weiss, Stanisław Osiński.
 * All rights reserved.
 *
 * Refer to the full license file "carrot2.LICENSE"
 * in the root folder of the repository checkout or at:
 * http://www.carrot2.org/carrot2.LICENSE
 */

package org.carrot2.matrix.factorization;

/**
 * Performs an iterative matrix factorization.
 */
public interface IIterativeMatrixFactorization extends IMatrixFactorization
{
    /**
     * Returns approximation error achieved after the last iteration of the
     * algorithm or -1 if the approximation error is not available.
     * 
     * @return approximation error or -1
     */
    public abstract double getApproximationError();

    /**
     * Returns the number of iterations the algorithm has completed.
     * 
     * @return the number of iterations the algorithm has completed
     */
    public abstract int getIterationsCompleted();
}