Complex.Phase Property
Definition
Important
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Gets the phase of a complex number.
public:
property double Phase { double get(); };
public double Phase { get; }
member this.Phase : double
Public ReadOnly Property Phase As Double
Property Value
The phase of a complex number, in radians.
Examples
The following example uses the FromPolarCoordinates method to instantiate a complex number based on its polar coordinates, and then displays the value of its Magnitude and Phase properties.
using System;
using System.Numerics;
public class Example
{
public static void Main()
{
Complex c1 = Complex.FromPolarCoordinates(10, 45 * Math.PI / 180);
Console.WriteLine("{0}:", c1);
Console.WriteLine(" Magnitude: {0}", Complex.Abs(c1));
Console.WriteLine(" Phase: {0} radians", c1.Phase);
Console.WriteLine(" Phase {0} degrees", c1.Phase * 180/Math.PI);
Console.WriteLine(" Atan(b/a): {0}", Math.Atan(c1.Imaginary/c1.Real));
}
}
// The example displays the following output:
// (7.07106781186548, 7.07106781186547):
// Magnitude: 10
// Phase: 0.785398163397448 radians
// Phase 45 degrees
// Atan(b/a): 0.785398163397448
open System
open System.Numerics
let c1 = Complex.FromPolarCoordinates(10., 45. * Math.PI / 180.)
printfn $"{c1}:"
printfn $" Magnitude: {Complex.Abs(c1)}"
printfn $" Phase: {c1.Phase} radians"
printfn $" Phase {c1.Phase * 180. / Math.PI} degrees"
printfn $" Atan(b/a): {Math.Atan(c1.Imaginary / c1.Real)}"
// The example displays the following output:
// (7.07106781186548, 7.07106781186547):
// Magnitude: 10
// Phase: 0.785398163397448 radians
// Phase 45 degrees
// Atan(b/a): 0.785398163397448
Imports System.Numerics
Module Example
Public Sub Main()
Dim c1 As Complex = Complex.FromPolarCoordinates(10, 45 * Math.Pi / 180)
Console.WriteLine("{0}:", c1)
Console.WriteLine(" Magnitude: {0}", Complex.Abs(c1))
Console.WriteLine(" Phase: {0} radians", c1.Phase)
Console.WriteLine(" Phase {0} degrees", c1.Phase * 180/Math.Pi)
Console.WriteLine(" Atan(b/a): {0}", Math.Atan(c1.Imaginary/c1.Real))
End Sub
End Module
' The example displays the following output:
' (7.07106781186548, 7.07106781186547):
' Magnitude: 10
' Phase: 0.785398163397448 radians
' Phase 45 degrees
' Atan(b/a): 0.785398163397448
Remarks
For a complex number a + bi
, the phase is computed as Atan(b, a)
.
You can identify a complex number by its Cartesian coordinates on the complex plane or by its polar coordinates. The phase (argument) of a complex number is the angle to the real axis of a line drawn from the point of origin (the intersection of the x-axis and the y-axis) to the point represented by the complex number. The magnitude (represented by the Magnitude property) is the distance from the point of origin to the point that is represented by the complex number.
You can instantiate a complex number based on its polar coordinates instead of its Cartesian coordinates by calling the FromPolarCoordinates method.
To convert the phase from radians to degrees, multiply it by $\frac{180}{\pi}$.
Applies to
See also
Athugasemdir
https://aka.ms/ContentUserFeedback.
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