 | Double |
DoubleForward1DFFT represents the forward discrete fourier transform of a 1D real signal vector.
Inheritance HierarchyNamespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4
SyntaxThe DoubleForward1DFFT type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | DoubleForward1DFFT(FFTBase) | Constructs a forward 1D FFT instance by copying the configuration from another FFT instance. |
| DoubleForward1DFFT(Int32) | Constructs a forward 1D FFT instance for double real signal vectors. |
Properties| Name | Description | |
|---|---|---|
 | Dimension |
Gets the FFT dimension.
(Inherited from FFTBase) |
| Direction |
Gets the direction of the FFT, either forward or backward.
(Inherited from FFTBase) |
| Domain |
Gets the forward domain of signal data; either complex or real.
(Inherited from FFTBase) |
| ForwardScaleFactor | Gets or sets the forward scale factor of the FFT; The default is 1.0 |
| Length |
Gets the length of the signal data.
(Inherited from FFTBase) |
| Precision |
Gets the FFT precision; either float or double
(Inherited from FFTBase) |
Methods| Name | Description | |
|---|---|---|
| Clone | Creates a deep copy of this FFT instance. |
| CreateInverseFFT | Creates a backward FFT instance of this forward double real 1D FFT. |
| FFT(Double) | Computes foward FFT of vin. |
| FFT(DoubleVector) | Computes the foward FFT of vin. |
| FFT(Double, Double) | Computes foward FFT of vin and places the result in vout |
| FFT(DoubleVector, DoubleVector) | Computes the foward FFT of vin and places the result in vout |
| FFT(Double, Int32, Double) | Computes the forward FFT of vin and places the result in vout, where vin and vout contain offset signal data, vinoffset, voutoffset, respectively, from the [0] element. |
| FFTInPlace(Double) | Computes the in-place forward FFT of the signal vinout. |
| FFTInPlace(Double) | Obsolete. Computes the forward 1D FFT of each row in arrayinout and returns the complex conjugate symmetric results in-place in a packed format. |
| FFTInPlace(DoubleVector) | Computes the in-place forward FFT of the signal vinout. |
| FFTInPlace(Double, Int32) | Computes the in-place forward FFT of the signal vinout. |
| FFTInPlaceArray | Computes the forward 1D FFT of each row in arrayinout and returns the complex conjugate symmetric results in-place in a packed format. |
| GetSignalReader(Double) | Generates the appropriate reader to unpack the packed complex conjugate symmetric FFT's computed by this class. |
| GetSignalReader(Double) | Obsolete. Generates the appropriate reader to unpack the packed complex conjugate symmetric FFT's computed by this class. |
| GetSignalReader(DoubleVector) | Generates the appropriate reader to unpack the packed complex conjugate symmetric FFT's computed by this class. |
| GetSignalReaderForArray | Generates the appropriate reader to unpack the packed complex conjugate symmetric FFT's computed by this class. |
| ToString |
Returns a String containing a summary of this FFT type.
(Inherited from FFTBase) |
Fields| Name | Description | |
|---|---|---|
 | ipconfig_ |
In-place FFT configuration.
(Inherited from FFTBase) |
| ofpconfig_ |
Out-of-place FFT configuration.
(Inherited from FFTBase) |
Remarks The forward FFT is defined to have a negative exponent in the transform with a default
scale factor of 1.0.
To gain greater efficiency in transforming sets of same-length signals, first arrange signals row-by-row in an
array, and then use the method.
C#
FFTInPlace(double[,] arrayinout)Example
This example computes a length 555 signal and places the complex complex result in the vector.
C#
unpackedsignal
C#
DoubleForward1DFFT fft = new DoubleForward1DFFT( 555 ); fft.FFTInPlace( x ); DoubleSymmetricSignalReader reader = fft.GetSignalReader( x ); FloatComplex[] unpackedsignal = reader.UnpackFullToArray();
See Also