/**
* Returns the geometric mean of the entries in the specified portion of the input array, or
* <code>Double.NaN</code> if the designated subarray is empty.
*
* <p>Throws <code>IllegalArgumentException</code> if the array is null.
*
* <p>See {@link org.apache.commons.math3.stat.descriptive.moment.GeometricMean} for details on
* the computing algorithm.
*
* @param values the input array
* @param begin index of the first array element to include
* @param length the number of elements to include
* @return the geometric mean of the values or Double.NaN if length = 0
* @throws MathIllegalArgumentException if the array is null or the array index parameters are not
* valid
*/
public static double geometricMean(final double[] values, final int begin, final int length)
throws MathIllegalArgumentException {
return GEOMETRIC_MEAN.evaluate(values, begin, length);
}
/**
* Returns the geometric mean of the entries in the input array, or <code>Double.NaN</code> if the
* array is empty.
*
* <p>Throws <code>IllegalArgumentException</code> if the array is null.
*
* <p>See {@link org.apache.commons.math3.stat.descriptive.moment.GeometricMean} for details on
* the computing algorithm.
*
* @param values the input array
* @return the geometric mean of the values or Double.NaN if the array is empty
* @throws MathIllegalArgumentException if the array is null
*/
public static double geometricMean(final double[] values) throws MathIllegalArgumentException {
return GEOMETRIC_MEAN.evaluate(values);
}