ManagedFft2D.ForwardTransform Method

Definition

Namespace: Numerics.NET.SignalProcessing
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.0

Overload List

ForwardTransform(ReadOnlySpan<Complex<Double>>, Int32, Span<Complex<Double>>, Int32)

Computes the discrete Fourier transform of a real signal.
C# 
public override void ForwardTransform(
	ReadOnlySpan<Complex<double>> input,
	int inputLeadingDimension,
	Span<Complex<double>> output,
	int outputLeadingDimension
)

Parameters

input  ReadOnlySpan<Complex<Double>>
A span containing a real 2D array containing the input signal.
inputLeadingDimension  Int32
The number of elements between the start of successive columns in input.
output  Span<Complex<Double>>
A span containing a complex 2D array to hold the transformed signal.
outputLeadingDimension  Int32
The number of elements between the start of successive columns in output.

Remarks

The output is stored in a compact format to take advantage of the symmetry properties of a real Fourier transform. Specifically, output contains only the first n/2+1 terms of the transformed signal.

Exceptions

InvalidOperationException

The Fourier transform implementation is not configured to accept real input.

ForwardTransform(ReadOnlySpan<Double>, Int32, Span<Complex<Double>>, Int32)

Computes the discrete Fourier transform of a real signal.
C# 
public override void ForwardTransform(
	ReadOnlySpan<double> input,
	int inputLeadingDimension,
	Span<Complex<double>> output,
	int outputLeadingDimension
)

Parameters

input  ReadOnlySpan<Double>
A span containing a real 2D array containing the input signal.
inputLeadingDimension  Int32
The number of elements between the start of successive columns in input.
output  Span<Complex<Double>>
A span containing a complex 2D array to hold the transformed signal.
outputLeadingDimension  Int32
The number of elements between the start of successive columns in output.

Remarks

The output is stored in a compact format to take advantage of the symmetry properties of a real Fourier transform. Specifically, output contains only the first n/2+1 terms of the transformed signal.

Exceptions

InvalidOperationException

The Fourier transform implementation is not configured to accept real input.

See Also