public void CalculateIntegralByDifferentTrapeze_Test()
{
double result = IntegralCalculation.CalculateIntegralByTrapeze(
(x) => x * x, 2, -2, 0.01);
Assert.AreEqual(16.0 / 3, result, 0.01);
}
/// <summary>
/// Вычисляет функцию Лапласа.
/// </summary>
/// <param name="z">Значение.</param>
/// <returns>Значение функции Лапласа.</returns>
public double LaplasFunction(double z)
{
Func <double, double> funcBelowIntegral = (arg) => Math.Exp(-1 * arg * arg / 2);
double result = 1 / Math.Sqrt(2 * Math.PI) *
IntegralCalculation.CalculateIntegralByTrapeze(
funcBelowIntegral, z, -100, 0.1);
return(result);
}
/// <summary>
/// Вычисляет вероятность выполнения условия cond для значения x.
/// </summary>
/// <param name="x">Значение.</param>
/// <param name="cond">Условие.</param>
/// <returns>Вероятность.</returns>
public double GetProbabilityWithCondition(double x, ConditionOfProbability cond)
{
double z = (x - average) / standDif;
Func <double, double> funcBelowIntegral = (arg) => Math.Exp(-1 * arg * arg / 2);
double result = 1 / Math.Sqrt(2 * Math.PI) *
IntegralCalculation.CalculateIntegralByTrapeze(
funcBelowIntegral, z, -100, 0.1);
if (cond == ConditionOfProbability.RandomVariableMoreThanX || cond == ConditionOfProbability.RandomVariableMoreOrEqualX)
{
result = 1 - result;
}
return(result);
}