Complex.Exp(Complex) Complex.Exp(Complex) Complex.Exp(Complex) Complex.Exp(Complex) Method

定義

e を指定した複素数で累乗した値を返します。Returns e raised to the power specified by a complex number.

public:
 static System::Numerics::Complex Exp(System::Numerics::Complex value);
public static System.Numerics.Complex Exp (System.Numerics.Complex value);
static member Exp : System.Numerics.Complex -> System.Numerics.Complex
Public Shared Function Exp (value As Complex) As Complex

パラメーター

value
Complex Complex Complex Complex

累乗に使用する値を指定する複素数。A complex number that specifies a power.

戻り値

数値 evalue で累乗した値。The number e raised to the power value.

次の例は、 Expメソッドを示しています。The following example illustrates the Exp method. これは、 Doubleデータ型の有効桁数が不足していると、メソッドから返された値ExpをメソッドLogに渡すことによって元Complexの値が返されることを示しています。It shows that, with some allowance for the lack of precision of the Double data type, passing the value returned by the Log method to the Exp method returns the original Complex value.

using System;
using System.Numerics;

public class Example
{
   public static void Main()
   {
      Complex[] values = { new Complex(1.53, 9.26), 
                           new Complex(2.53, -8.12),
                           new Complex(-2.81, 5.32),
                           new Complex(-1.09, -3.43),
                           new Complex(Double.MinValue/2, Double.MinValue/2) };
      foreach (Complex value in values)
         Console.WriteLine("Exp(Log({0}) = {1}", value, 
                           Complex.Exp(Complex.Log(value)));
   }
}
// The example displays the following output:
//       Exp(Log((1.53, 9.26)) = (1.53, 9.26)
//       Exp(Log((2.53, -8.12)) = (2.53, -8.12)
//       Exp(Log((-2.81, 5.32)) = (-2.81, 5.32)
//       Exp(Log((-1.09, -3.43)) = (-1.09, -3.43)
//       Exp(Log((-8.98846567431158E+307, -8.98846567431158E+307)) = (-8.98846567431161E+307, -8.98846567431161E+307)
Imports System.Numerics

Module Example
   Public Sub Main()
      Dim values() As Complex = { New Complex(1.53, 9.26), 
                                  New Complex(2.53, -8.12),
                                  New Complex(-2.81, 5.32),
                                  New Complex(-1.09, -3.43),
                                  New Complex(Double.MinValue/2, Double.MinValue/2) }
      For Each value As Complex In values
         Console.WriteLine("Exp(Log({0}) = {1}", value, 
                           Complex.Exp(Complex.Log(value)))
      Next                                  
   End Sub
End Module
' The example displays the following output:
'      Exp(Log((1.53, 9.26)) = (1.53, 9.26)
'      Exp(Log((2.53, -8.12)) = (2.53, -8.12)
'      Exp(Log((-2.81, 5.32)) = (-2.81, 5.32)
'      Exp(Log((-1.09, -3.43)) = (-1.09, -3.43)
'      Exp(Log((-8.98846567431158E+307, -8.98846567431158E+307)) = (-8.98846567431161E+307, -8.98846567431161E+307)

注釈

Powメソッドを使用して、他のベースの累乗を計算します。Use the Pow method to calculate the powers of other bases.

複素数Expのメソッドは、実数のMath.Expメソッドに対応しています。The Exp method for complex numbers corresponds to the Math.Exp method for real numbers. Expは、のLog逆です。Exp is the inverse of Log.

適用対象

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