/**
* @brief Výpočet smerodajnej odchýlky
*
* @param list Zoznam double, z ktorého vypočítať smerodajnú odchýlku
* @return Smerodajná odchýlka
*/
public static double GetStandartDeviation(List <double> list)
{
int N = list.Count;
double tmp = MatLib.subtract(GetSumSqr(list), MatLib.multiply(N, MatLib.square(GetArithmeticMean(list))));
try
{
tmp = MatLib.divide(tmp, N - 1);
}
catch (DivideByZeroException e)
{
Console.WriteLine("{0}", e.Message);
Console.WriteLine("Press any key to continue . . .");
Console.Read();
Environment.Exit(-1);
}
tmp = MatLib.sqrt(tmp);
return(tmp);
}
public void ShouldSqrt()
{
Assert.AreEqual(0, MatLib.sqrt(0));
Assert.AreEqual(1, MatLib.sqrt(1));
Assert.AreEqual(1.414213562373, MatLib.sqrt(2), Accuracy);
Assert.AreEqual(5, MatLib.sqrt(25));
Assert.AreEqual(0.707106781186547, MatLib.sqrt(0.5), Accuracy);
Assert.AreEqual(387.2989801174281, MatLib.sqrt(150000.5), Accuracy);
Assert.AreNotEqual(1000, MatLib.sqrt(999999), Accuracy);
try
{
MatLib.sqrt(-1);
Assert.Fail("Chyba, nepatri do oboru realnych cisel.");
}
catch
{
}
}