Package org.apache.mahout.math.hadoop

Examples of org.apache.mahout.math.hadoop.DistributedRowMatrix.times()

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    Vector ranking = new DenseVector(numVertices).assign(1.0 / numVertices);
    Vector dampingVector = createDampingVector(numVertices, stayingProbability);

    /* power method: iterative transition-matrix times ranking-vector multiplication */
    while (numIterations-- > 0) {
      ranking = transitionMatrix.times(ranking).plus(dampingVector);
    }

    persistVector(getConf(), getTempPath(RANK_VECTOR), ranking);

    Job vertexWithPageRank = prepareJob(vertexIndexPath, getOutputPath(), SequenceFileInputFormat.class,
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    DistributedConjugateGradientSolver solver = new DistributedConjugateGradientSolver();
    ToolRunner.run(getConfiguration(), solver.job(), args);
   
    Vector x = loadVector(conf, output);
   
    Vector solvedVector = matrix.times(x);   
    double distance = Math.sqrt(vector.getDistanceSquared(solvedVector));
    assertEquals(0.0, distance, EPSILON);
  }
}
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    Vector vector = randomVector(matrix.numCols(), 10.0);
   
    DistributedConjugateGradientSolver solver = new DistributedConjugateGradientSolver();
    Vector x = solver.solve(matrix, vector);

    Vector solvedVector = matrix.times(x);   
    double distance = Math.sqrt(vector.getDistanceSquared(solvedVector));
    assertEquals(0.0, distance, EPSILON);
  }
}
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    DistributedConjugateGradientSolver solver = new DistributedConjugateGradientSolver();
    solver.job().run(args);
   
    Vector x = loadVector(conf, output);
   
    Vector solvedVector = matrix.times(x);   
    double distance = Math.sqrt(vector.getDistanceSquared(solvedVector));
    assertEquals(0.0, distance, EPSILON);
  }
}
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    Vector vector = randomVector(matrix.numCols(), 10.0);
   
    DistributedConjugateGradientSolver solver = new DistributedConjugateGradientSolver();
    Vector x = solver.solve(matrix, vector);

    Vector solvedVector = matrix.times(x);   
    double distance = Math.sqrt(vector.getDistanceSquared(solvedVector));
    assertEquals(0.0, distance, EPSILON);
  }
}
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