Advanced Analysis Library Only
AnalysisLibErrType FFT2D (void *timeDomainSignal, int numberOfRows, int numberOfColumns, int numberOfRowsForFFT, int numberOfColumnsForFFT, int shift, void *fft);
Computes the Fast Fourier Transform (FFT) of a 2D time-domain signal.
Input | ||
Name | Type | Description |
timeDomainSignal | numeric array | The real time-domain signal. |
numberOfRows | integer | The number of rows in timeDomainSignal. |
numberOfColumns | integer | The number of columns in timeDomainSignal. |
numberOfRowsForFFT | integer | The number of rows on which to perform the FFT. If numberOfRowsForFFT does not equal numberOfRows, this function truncates timeDomainSignal or pads timeDomainSignal with zeros to create a numberOfRowsForFFT by numberOfColumnsForFFT matrix for which it calculates the FFT. If numberOfRowsForFFT is less than 1, this function uses numberOfRows for this parameter. |
numberOfColumnsForFFT | integer | The number of columns on which to perform the FFT. If numberOfColumnsForFFT does not equal numberOfColumns, this function truncates timeDomainSignal or pads timeDomainSignal with zeros to create a numberOfRowsForFFT by numberOfColumnsForFFT matrix for which it calculates the FFT. If numberOfColumnsForFFT is less than 1, this function uses numberOfColumns for this parameter. |
shift | integer | Specifies whether to shift the DC component to the center of the FFT result. shift must be one of the following values:
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Output | ||
Name | Type | Description |
fft | numeric array | The FFT of the time-domain signal. |
Name | Type | Description |
status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |