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- public static double StdDevP(this IEnumerable<int> source)
- {
- return StdDevLogic(source, 0);
- }
- public static double StdDev(this IEnumerable<int> source)
- {
- return StdDevLogic(source, 1);
- }
- private static double StdDevLogic(this IEnumerable<int> source, int buffer = 1)
- {
- if (source == null)
- { throw new ArgumentNullException("source"); }
- var data = source.ToList();
- var average = data.Average();
- var differences = data.Select(u => Math.Pow(average - u, 2.0)).ToList();
- return Math.Sqrt(differences.Sum() / (differences.Count() - buffer));
- }
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