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Subject [GitHub] [flink] walterddr commented on a change in pull request #9576: [FLINK-13915][ml] Add several base classes of summarizer.
Date Tue, 07 Jan 2020 18:50:30 GMT
walterddr commented on a change in pull request #9576: [FLINK-13915][ml] Add several base classes
of summarizer.
URL: https://github.com/apache/flink/pull/9576#discussion_r363891440
 
 

 ##########
 File path: flink-ml-parent/flink-ml-lib/src/main/java/org/apache/flink/ml/operator/common/statistics/basicstatistic/BaseSummarizer.java
 ##########
 @@ -0,0 +1,94 @@
+/*
+ * 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 org.apache.flink.ml.operator.common.statistics.basicstatistic;
+
+import org.apache.flink.ml.common.linalg.DenseMatrix;
+
+import java.io.Serializable;
+
+/**
+ * Summarizer is the base class to calculate summary and store intermediate results, and
Summary is the result of Summarizer.
+ *
+ * <p>Summarizer Inheritance relationship as follow:
+ *         BaseSummarizer
+ *            /       \
+ *           /         \
+ * TableSummarizer   BaseVectorSummarizer
+ *                     /            \
+ *                    /              \
+ *     SparseVectorSummarizer    DenseVectorSummarizer
+ *
+ * <p>TableSummarizer is for table data, BaseVectorSummarizer is for vector data.
+ *  SparseVectorSummarizer is for sparse vector, DenseVectorSummarizer is for dense vector.
+ *
+ *  <p>Summary Inheritance relationship as follow:
 
 Review comment:
   ```suggestion
    * <p>Summary is the result of Summarizer. {@link BaseSummary} is the base class
of summaries.
    *
    * <p>Summary Inheritance relationship as follow:
   ```

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