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From myui <...@git.apache.org>
Subject [GitHub] incubator-hivemall pull request #167: [HIVEMALL-220] Implement Cofactor
Date Fri, 19 Oct 2018 09:06:42 GMT
Github user myui commented on a diff in the pull request:

    https://github.com/apache/incubator-hivemall/pull/167#discussion_r226578495
  
    --- Diff: core/src/main/java/hivemall/mf/CofactorModel.java ---
    @@ -0,0 +1,715 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + *   http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing,
    + * software distributed under the License is distributed on an
    + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    + * KIND, either express or implied.  See the License for the
    + * specific language governing permissions and limitations
    + * under the License.
    + */
    +package hivemall.mf;
    +
    +import hivemall.annotations.VisibleForTesting;
    +import hivemall.fm.Feature;
    +import hivemall.utils.lang.Preconditions;
    +import hivemall.utils.math.MathUtils;
    +import it.unimi.dsi.fastutil.objects.Object2DoubleArrayMap;
    +import it.unimi.dsi.fastutil.objects.Object2DoubleMap;
    +import org.apache.commons.math3.linear.ArrayRealVector;
    +import org.apache.commons.math3.linear.Array2DRowRealMatrix;
    +import org.apache.commons.math3.linear.RealMatrix;
    +import org.apache.commons.math3.linear.RealVector;
    +import org.apache.commons.math3.linear.SingularValueDecomposition;
    +import org.apache.hadoop.hive.ql.metadata.HiveException;
    +
    +import javax.annotation.Nonnegative;
    +import javax.annotation.Nonnull;
    +import javax.annotation.Nullable;
    +import java.util.ArrayList;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +import java.util.Random;
    +
    +
    +public class CofactorModel {
    +
    +    public enum RankInitScheme {
    +        random /* default */, gaussian;
    +
    --- End diff --
    
    please remove unnessesary line breaks.


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