mahout-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-1500) H2O integration
Date Thu, 14 Aug 2014 23:49:20 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-1500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14097921#comment-14097921
] 

ASF GitHub Bot commented on MAHOUT-1500:
----------------------------------------

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

    https://github.com/apache/mahout/pull/21#discussion_r16274064
  
    --- Diff: h2o/src/main/java/org/apache/mahout/h2obindings/ops/RowRange.java ---
    @@ -0,0 +1,83 @@
    +/*
    + *  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.mahout.h2obindings.ops;
    +
    +import scala.collection.immutable.Range;
    +
    +import water.MRTask;
    +import water.fvec.Frame;
    +import water.fvec.Vec;
    +import water.fvec.Chunk;
    +import water.fvec.NewChunk;
    +import water.parser.ValueString;
    +
    +import org.apache.mahout.h2obindings.drm.H2ODrm;
    +
    +public class RowRange {
    +  /* Filter operation */
    +  public static H2ODrm RowRange(H2ODrm drmA, final Range R) {
    +    Frame A = drmA.frame;
    +    Vec keys = drmA.keys;
    +
    +    /* Run a filtering MRTask on A. If row number falls within R.start() and
    +       R.end(), then the row makes it into the output
    +    */
    +    Frame Arr = new MRTask() {
    +        public void map(Chunk chks[], NewChunk ncs[]) {
    +          int chunk_size = chks[0].len();
    +          long chunk_start = chks[0].start();
    +
    +          /* First check if the entire chunk even overlaps with R */
    +          if (chunk_start > R.end() || (chunk_start + chunk_size) < R.start())
    +            return;
    +
    +          /* This chunk overlaps, filter out just the overlapping rows */
    +          for (int r = 0; r < chunk_size; r++) {
    +            if (!R.contains(chunk_start + r))
    +              continue;
    --- End diff --
    
    if statment needs braces


> H2O integration
> ---------------
>
>                 Key: MAHOUT-1500
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1500
>             Project: Mahout
>          Issue Type: Improvement
>            Reporter: Anand Avati
>             Fix For: 1.0
>
>
> Provide H2O backend for the Mahout DSL



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message