72 lines
2.1 KiB
C#
72 lines
2.1 KiB
C#
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/*
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* C# Program to Find the Standard Deviation of a Set of Given Numbers
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*/
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using System;
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using System.Collections.Generic;
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namespace SampleApp
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{
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internal class Program
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{
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private static void Main()
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{
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List<double> number = new List<double> { 1, 2, 3, 4, 5, 6 };
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double mean = number.Mean();
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double variance = number.Variance();
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double sd = number.StandardDeviation();
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Console.WriteLine("Mean: {0} , Variance: {1} , SD: {2} ", mean, variance, sd);
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Console.ReadKey();
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}
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}
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public static class list
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{
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public static double Mean(this List<double> values)
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{
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return values.Count == 0 ? 0 : values.Mean(0, values.Count);
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}
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public static double Mean(this List<double> values, int start, int end)
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{
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double s = 0;
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for (int i = start; i < end; i++)
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{
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s += values[i];
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}
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return s / (end - start);
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}
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public static double Variance(this List<double> values)
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{
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return values.Variance(values.Mean(), 0, values.Count);
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}
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public static double Variance(this List<double> values, double mean)
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{
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return values.Variance(mean, 0, values.Count);
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}
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public static double Variance(this List<double> values, double mean, int start, int end)
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{
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double variance = 0;
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for (int i = start; i < end; i++)
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{
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variance += Math.Pow((values[i] - mean), 2);
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}
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int n = end - start;
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if (start > 0) n -= 1;
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return variance / (n);
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}
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public static double StandardDeviation(this List<double> values)
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{
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return values.Count == 0 ? 0 : values.StandardDeviation(0, values.Count);
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}
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public static double StandardDeviation(this List<double> values, int start, int end)
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{
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double mean = values.Mean(start, end);
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double variance = values.Variance(mean, start, end);
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return Math.Sqrt(variance);
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}
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}
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}
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/*
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Mean : 3.5 Variance : 2.916666666667 S.D = 1.7078251256993
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