On Nov 9, 7:48 am, "vivekv80" <vivek_...@yahoo.com> wrote:
> 1.I used fftw_plan_dft_2d to compute the FFT for a double array of size nx
> by ny. the FFT values match the Matlab values. I also used
> fftw_plan_dft_2d(..,..,..,..,fftw_backward, fftw_estimate) to compute the
> IFFT. This also did not provide the desired results.
Matlab's ifft differs from FFTW's fftw_backward by a scale factor of 1/
N (N = # points = nx * ny).
Steven G. Johnson