final double[] zAbs = calculateAbsoluteDifferences(z);
final double[] zAbs = calculateAbsoluteDifferences(z);
final double[] zAbs = calculateAbsoluteDifferences(z);
final double[] zAbs = calculateAbsoluteDifferences(z);
final double[] zAbs = calculateAbsoluteDifferences(z);
final double[] zAbs = calculateAbsoluteDifferences(z);