CxFFT2D
Advanced Analysis Library Only
AnalysisLibErrType CxFFT2D (void *timeDomainSignal, ssize_t numberOfRows, ssize_t numberOfColumns, ssize_t numberOfRowsForFFT, ssize_t numberOfColumnsForFFT, int shift, void *fft);
Purpose
Computes the 2D Fast Fourier Transform (FFT) of a complex time-domain signal.
Parameters
| Input | ||
| Name | Type | Description |
| timeDomainSignal | void * | The complex time-domain signal. |
| numberOfRows | ssize_t | The number of rows in timeDomainSignal. |
| numberOfColumns | ssize_t | The number of columns in timeDomainSignal. |
| numberOfRowsForFFT | ssize_t | The number of rows on which to perform the FFT. If numberOfRowsForFFT is greater than numberOfRows, this function pads timeDomainSignal with zeros to match numberOfRowsForFFT. If numberOfRowsForFFT is less than numberOfRows, this function uses only the leading numberOfRowsForFFT rows to perform the FFT. If numberOfRowsForFFT is less than one, this function uses numberOfRows as numberOfRowsForFFT. |
| numberOfColumnsForFFT | ssize_t | The number of columns on which to perform the FFT. If numberOfColumnsForFFT is greater than numberOfColumns, this function pads timeDomainSignal with zeros to match numberOfColumnsForFFT. If numberOfColumnsForFFT is less than numberOfColumns, this function uses only the leading numberOfColumnsForFFT columns to perform the FFT. If numberOfColumnsForFFT is less than one, this function uses numberOfColumns as numberOfColumnsForFFT. |
| shift | int | Specifies whether to shift the DC component to the center of fft. shift must be one of the following values:
|
| Output | ||
| Name | Type | Description |
| FFT | void * | The 2D FFT of the complex time-domain signal. |
Return Value
| Name | Type | Description |
| status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |
Additional Information
Library: Advanced Analysis Library
Include file: analysis.h
LabWindows/CVI compatibility: LabWindows/CVI 8.0 and later