C# Class Scimark_Csharp_Android.FFT

Computes FFT's of complex, double precision data where n is an integer power of 2. This appears to be slower than the Radix2 method, but the code is smaller and simpler, and it requires no extra storage.

显示文件 Open project: zanew/MonovsDalvik Class Usage Examples

Public Methods

Method	Description
inverse ( double data ) : void	Compute Inverse Fast Fourier Transform of (complex) data, in place.
makeRandom ( int n ) : double[]	Make a random array of n (complex) elements.
num_flops ( int N ) : double
test ( double data ) : double	Accuracy check on FFT of data. Make a copy of data, Compute the FFT, then the inverse and compare to the original. Returns the rms difference.
transform ( double data ) : void	Compute Fast Fourier Transform of (complex) data, in place.

Protected Methods

Method	Description
bitreverse ( double data ) : void
log2 ( int n ) : int
transform_internal ( double data, int direction ) : void

Method Details

bitreverse() protected static method

protected static bitreverse ( double data ) : void
data	double
return	void

inverse() public static method

Compute Inverse Fast Fourier Transform of (complex) data, in place.

public static inverse ( double data ) : void
data	double
return	void

log2() protected static method

protected static log2 ( int n ) : int
n	int
return	int

makeRandom() public static method

Make a random array of n (complex) elements.

public static makeRandom ( int n ) : double[]
n	int
return	double[]

num_flops() public static method

public static num_flops ( int N ) : double
N	int
return	double

test() public static method

Accuracy check on FFT of data. Make a copy of data, Compute the FFT, then the inverse and compare to the original. Returns the rms difference.

public static test ( double data ) : double
data	double
return	double

transform() public static method

Compute Fast Fourier Transform of (complex) data, in place.

public static transform ( double data ) : void
data	double
return	void

transform_internal() protected static method

protected static transform_internal ( double data, int direction ) : void
data	double
direction	int
return	void