Examples of it.unimi.dsi.fastutil.doubles.DoubleIterator

it.unimi.dsi.fastutil.doubles.DoubleIterator


  @Override
  public void write(DataOutput out) throws IOException {
    out.writeInt(neighbors.size());
    LongIterator neighborsIt = neighbors.iterator();
    DoubleIterator edgeValuesIt = edgeValues.iterator();
    while (neighborsIt.hasNext()) {
      out.writeLong(neighborsIt.nextLong());
      out.writeDouble(edgeValuesIt.nextDouble());
    }
  }

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     *
     * @return The L2 norm of the vector
     */
    public double norm() {
        double ssq = 0;
        DoubleIterator iter = values().iterator();
        while (iter.hasNext()) {
            double v = iter.nextDouble();
            ssq += v * v;
        }
        return Math.sqrt(ssq);
    }

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        if (keys.isCompletelySet()) {
            for (int i = keys.domainSize() - 1; i >= 0; i--) {
                result += values[i];
            }
        } else {
            DoubleIterator iter = values().iterator();
            while (iter.hasNext()) {
                result += iter.nextDouble();
            }
        }
        return result;
    }

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            return new IdentityVectorNormalizer().makeTransformation(reference);
        } else {
            final double mean = reference.mean();


            double var = 0;
            DoubleIterator iter = reference.values().iterator();
            while (iter.hasNext()) {
                final double v = iter.nextDouble();
                final double diff = v - mean;
                var += diff * diff;
            }


            /* damping calculation as described in Hofmann '04

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    @Override
    public DictionaryPage createDictionaryPage() {
      if (lastUsedDictionarySize > 0) {
        // return a dictionary only if we actually used it
        PlainValuesWriter dictionaryEncoder = new PlainValuesWriter(lastUsedDictionaryByteSize);
        DoubleIterator doubleIterator = doubleDictionaryContent.keySet().iterator();
        // write only the part of the dict that we used
        for (int i = 0; i < lastUsedDictionarySize; i++) {
          dictionaryEncoder.writeDouble(doubleIterator.nextDouble());
        }
        return new DictionaryPage(dictionaryEncoder.getBytes(), lastUsedDictionarySize, PLAIN_DICTIONARY);
      }
      return plainValuesWriter.createDictionaryPage();
    }

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  @Override
  public void write(DataOutput out) throws IOException {
    out.writeInt(neighbors.size());
    LongIterator neighborsIt = neighbors.iterator();
    DoubleIterator edgeValuesIt = edgeValues.iterator();
    while (neighborsIt.hasNext()) {
      out.writeLong(neighborsIt.nextLong());
      out.writeDouble(edgeValuesIt.nextDouble());
    }
  }

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Related Classes of it.unimi.dsi.fastutil.doubles.DoubleIterator

org.apache.giraph.edge.LongDoubleArrayEdges

org.grouplens.lenskit.transform.normalize.MeanVarianceNormalizer

org.grouplens.lenskit.vectors.SparseVector

parquet.column.values.dictionary.DictionaryValuesWriter$PlainDoubleDictionaryValuesWriter

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