src/main/java/org/apache/datasketches/kll/KllFloatsSketchSortedView.java [124:147]:
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  private void populateFromSketch(final float[] srcQuantiles, final int[] srcLevels,
    final int srcNumLevels, final int numItems) {
    final int[] myLevels = new int[srcNumLevels + 1];
    final int offset = srcLevels[0];
    System.arraycopy(srcQuantiles, offset, quantiles, 0, numItems);
    int srcLevel = 0;
    int dstLevel = 0;
    long weight = 1;
    while (srcLevel < srcNumLevels) {
      final int fromIndex = srcLevels[srcLevel] - offset;
      final int toIndex = srcLevels[srcLevel + 1] - offset; // exclusive
      if (fromIndex < toIndex) { // if equal, skip empty level
        Arrays.fill(cumWeights, fromIndex, toIndex, weight);
        myLevels[dstLevel] = fromIndex;
        myLevels[dstLevel + 1] = toIndex;
        dstLevel++;
      }
      srcLevel++;
      weight *= 2;
    }
    final int numLevels = dstLevel;
    blockyTandemMergeSort(quantiles, cumWeights, myLevels, numLevels); //create unit weights
    KllHelper.convertToCumulative(cumWeights);
  }
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src/main/java/org/apache/datasketches/kll/KllDoublesSketchSortedView.java [124:147]:
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  private void populateFromSketch(final double[] srcQuantiles, final int[] srcLevels,
    final int srcNumLevels, final int numItems) {
    final int[] myLevels = new int[srcNumLevels + 1];
    final int offset = srcLevels[0];
    System.arraycopy(srcQuantiles, offset, quantiles, 0, numItems);
    int srcLevel = 0;
    int dstLevel = 0;
    long weight = 1;
    while (srcLevel < srcNumLevels) {
      final int fromIndex = srcLevels[srcLevel] - offset;
      final int toIndex = srcLevels[srcLevel + 1] - offset; // exclusive
      if (fromIndex < toIndex) { // if equal, skip empty level
        Arrays.fill(cumWeights, fromIndex, toIndex, weight);
        myLevels[dstLevel] = fromIndex;
        myLevels[dstLevel + 1] = toIndex;
        dstLevel++;
      }
      srcLevel++;
      weight *= 2;
    }
    final int numLevels = dstLevel;
    blockyTandemMergeSort(quantiles, cumWeights, myLevels, numLevels); //create unit weights
    KllHelper.convertToCumulative(cumWeights);
  }
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