public void ShouldSubtract()
{
Assert.AreEqual(10, MatLib.subtract(10, 0));
Assert.AreEqual(-10, MatLib.subtract(0, 10));
Assert.AreEqual(0, MatLib.subtract(5, 5));
Assert.AreEqual(0, MatLib.subtract(0, 0));
Assert.AreEqual(20000000, MatLib.subtract(60000000, 40000000));
Assert.AreEqual(-0.2, MatLib.subtract(0.4, 0.6), Accuracy);
Assert.AreEqual(0.2, MatLib.subtract(-0.4, -0.6), Accuracy);
Assert.AreEqual(-2.43812648, MatLib.subtract(4.4893192, 6.92744568), Accuracy);
Assert.AreEqual(2.43812648, MatLib.subtract(-4.4893192, -6.92744568), Accuracy);
Assert.AreNotEqual(0, MatLib.subtract(10, -10));
Assert.AreNotEqual(0, MatLib.subtract(-10, 10));
Assert.AreNotEqual(10, MatLib.subtract(-10, 20));
Assert.AreNotEqual(-50, MatLib.subtract(0, -50.0000357));
}
/**
* @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);
}
