Package org.apache.mahout.math

Examples of org.apache.mahout.math.NamedVector

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        new SequenceFile.Writer(fs, conf, outputPath, IntWritable.class, VectorWritable.class);
    try {
      IntWritable iw = new IntWritable();
      for (int i = 0; i < numEigenVectors; i++) {
        // Persist eigenvectors sorted by eigenvalues in descending order\
        NamedVector v = new NamedVector(state.getRightSingularVector(numEigenVectors - 1 - i),
            "eigenVector" + i + ", eigenvalue = " + state.getSingularValue(numEigenVectors - 1 - i));
        Writable vw = new VectorWritable(v);
        iw.set(i);
        seqWriter.append(iw, vw);
      }
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    if (sequentialAccess) {
      vector = new SequentialAccessSparseVector(vector);
    }

    if (namedVector) {
      vector = new NamedVector(vector, key.toString());
    }

    // if the vector has no nonZero entries (nothing in the dictionary), let's not waste space sending it to disk.
    if (vector.getNumNondefaultElements() > 0) {
      VectorWritable vectorWritable = new VectorWritable(vector);
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        // seems like that may not be desirable
        return null;
      }

      if (normPower == LuceneIterable.NO_NORMALIZING) {
        result = new NamedVector(result, name);
      } else {
        result = new NamedVector(result.normalize(normPower), name);
      }
      return result;
    } catch (IOException ioe) {
      throw new IllegalStateException(ioe);
    }
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      vector = new SequentialAccessSparseVector(cardinality);
    } else {
      vector = new RandomAccessSparseVector(cardinality);
    }
    if (namedVectors) {
      vector = new NamedVector(vector, key.toString());
    }
    encoder.addToVector(value.toString(), vector);
    context.write(new Text(key.toString()), new VectorWritable(vector));
  }
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    if (sequentialAccess) {
      vector = new SequentialAccessSparseVector(vector);
    }
   
    if (namedVector) {
      vector = new NamedVector(vector, key.toString());
    }
   
    VectorWritable vectorWritable = new VectorWritable(vector);
    context.write(key, vectorWritable);
  }
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    Preconditions.checkArgument((vA != null || vB != null) || (vOut != null));

    if (vOut == null) {
      vOut = new SequentialAccessSparseVector(dimsA + dimsB);
      if (isNamed) {
        vOut = new NamedVector(vOut, name);
      }
    }

    if (vA != null) {
      appendVector(vOut, vA, 0);
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    if (sequentialAccess) {
      vector = new SequentialAccessSparseVector(vector);
    }
   
    if (namedVector) {
      vector = new NamedVector(vector, key.toString());
    }

    // drop empty vectors.
    if (vector.getNumNondefaultElements() > 0) {
      VectorWritable vectorWritable = new VectorWritable(vector);
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    }

    @SuppressWarnings("unchecked")
    private void outputQRow(Writable key, Vector qRow, Vector aRow) throws IOException {
      if (nv && (aRow instanceof NamedVector)) {
        qRowValue.set(new NamedVector(qRow, ((NamedVector) aRow).getName()));
      } else {
        qRowValue.set(qRow);
      }
      outputs.getCollector(OUTPUT_Q, null).collect(key, qRowValue);
    }
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      /*
       * MAHOUT-1067: inherit A names too.
       */
      if (qRow instanceof NamedVector) {
        uRowWritable.set(new NamedVector(uRow, ((NamedVector) qRow).getName()));
      } else {
        uRowWritable.set(uRow);
      }

      context.write(key, uRowWritable); // U inherits original A row labels.
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    Configuration conf = getConfiguration();
    Collection<Double> newEigenValues = Lists.newArrayList();

    int i = 0;
    for (VectorWritable value : new SequenceFileValueIterable<VectorWritable>(cleanEigenvectors, conf)) {
      NamedVector v = (NamedVector) value.get();
      eigenVectors.assignRow(i, v);
      log.info(v.getName());
      if (EigenVector.getCosAngleError(v.getName()) < 1.0e-3) {
        eigenvalues.add(EigenVector.getEigenValue(v.getName()));
      }
      i++;
    }
    assertEquals("number of clean eigenvectors", 3, i);

    i = 0;
    for (VectorWritable value : new SequenceFileValueIterable<VectorWritable>(cleanEigenvectors2, conf)) {
      NamedVector v = (NamedVector) value.get();
      log.info(v.getName());
      eigenVectors2.assignRow(i, v);
      newEigenValues.add(EigenVector.getEigenValue(v.getName()));
      i++;
    }

    Collection<Integer> oldEigensFound = Lists.newArrayList();
    for (int row = 0; row < eigenVectors.numRows(); row++) {
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