Maths Algorithms in C#: The Geometric Mean
The geometric mean is similar to the arithmetic mean in that it is a type of average for the data, except it has a rather different way of calculating it.
The geometric mean is defined as the n-th root of the product of each value in the data set, where n is the number of data points in the set. This makes it useful for describing things such as percentage growth.
public static double GeometricMean(List<double> values)
{
double geometricMean, product;
product = 1.0;
foreach(double value in values)
{
product *= value;
}
geometricMean = Math.Pow(product, (1.0 / (double)values.Count));
return geometricMean;
}The full sourcecode for the MathLib library is available at https://github.com/sjmeunier/mathlib
Originally posted on my old blog, Smoky Cogs, on 23 Oct 2009
Updated 5 Oct 2016: Updated code snippet after refactoring MathLib library