https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/How-to-shift-zero-frequency-with-2d-fftw-data/m-p/928145#M13522 <P>Hi,gays! I do&nbsp; SFFTW_PLAN_DFT_R2C_2D(FFTW_PLAN,nx,ny,density,fft,FFTW_ESTIMATE) and then get a complex array fft(ny/2+1,nx)! I try to shift the &nbsp;zero frequency to the center but failed! Who can tell me how to&nbsp;&nbsp;shift zero frequency on&nbsp; fft(ny/2+1,nx)?</P> <P>Thanks!</P> Wed, 04 Dec 2013 12:00:14 GMT bin_z_ 2013-12-04T12:00:14Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/How-to-shift-zero-frequency-with-2d-fftw-data/m-p/928145#M13522 <P>Hi,gays! I do&nbsp; SFFTW_PLAN_DFT_R2C_2D(FFTW_PLAN,nx,ny,density,fft,FFTW_ESTIMATE) and then get a complex array fft(ny/2+1,nx)! I try to shift the &nbsp;zero frequency to the center but failed! Who can tell me how to&nbsp;&nbsp;shift zero frequency on&nbsp; fft(ny/2+1,nx)?</P> <P>Thanks!</P> Wed, 04 Dec 2013 12:00:14 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/How-to-shift-zero-frequency-with-2d-fftw-data/m-p/928145#M13522 bin_z_ 2013-12-04T12:00:14Z