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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3919) Distributed Linear Algebra: row-based matrix
Date Mon, 30 May 2016 14:06:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15306694#comment-15306694
] 

ASF GitHub Bot commented on FLINK-3919:
---------------------------------------

Github user chiwanpark commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1996#discussion_r65076170
  
    --- Diff: flink-libraries/flink-ml/src/main/scala/org/apache/flink/ml/math/distributed/DistributedRowMatrix.scala
---
    @@ -0,0 +1,167 @@
    +/*
    + * 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.math.distributed
    +
    +import java.lang
    +
    +import breeze.linalg.{CSCMatrix => BreezeSparseMatrix, Matrix => BreezeMatrix,
Vector => BreezeVector}
    +import org.apache.flink.api.common.functions.RichGroupReduceFunction
    +import org.apache.flink.api.common.typeinfo.TypeInformation
    +import org.apache.flink.api.scala._
    +import org.apache.flink.ml.math.{Matrix => FlinkMatrix, _}
    +import org.apache.flink.util.Collector
    +import org.apache.flink.ml.math.Breeze._
    +import scala.collection.JavaConversions._
    +
    +/**
    +  *
    +  * @param numRowsOpt If None, will be calculated from the DataSet.
    +  * @param numColsOpt If None, will be calculated from the DataSet.
    +  */
    +class DistributedRowMatrix(data: DataSet[IndexedRow],
    +                           numRowsOpt: Option[Int] = None,
    +                           numColsOpt: Option[Int] = None)
    +    extends DistributedMatrix {
    +
    +  lazy val getNumRows: Int = numRowsOpt match {
    +    case Some(rows) => rows
    +    case None => data.count().toInt
    +  }
    +
    +  lazy val getNumCols: Int = numColsOpt match {
    +    case Some(cols) => cols
    +    case None => calcCols
    +  }
    --- End diff --
    
    I think it is okay.


> Distributed Linear Algebra: row-based matrix
> --------------------------------------------
>
>                 Key: FLINK-3919
>                 URL: https://issues.apache.org/jira/browse/FLINK-3919
>             Project: Flink
>          Issue Type: New Feature
>          Components: Machine Learning Library
>            Reporter: Simone Robutti
>            Assignee: Simone Robutti
>
> Distributed matrix implementation as a DataSet of IndexedRow and related operations



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