https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992730#M18089 Why not provide the data and we will look at the problem. Bruce Tue, 12 Apr 2005 06:34:19 GMT Intel_C_Intel 2005-04-12T06:34:19Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992728#M18087 <DIV></DIV> <DIV>I am evaluating the MKL for creating a signal processing library. My specific needs are to make use of the 1/2/3-d dft functions. Testing the 1d real dft function gives expected results. Testing the 2d real dft vs. the 2d complex dft yields different answers (ignoring the complex conjugate symmetry). The 3x3 matrix is a linear, contiguous array, so the strides are 0,N,1. Other than memory allocation, and loading real vs. complex data, the real and complex code is identical. Is there a bug here, or am I missing something? I can display code if necessary.</DIV> <DIV></DIV> <DIV>Thanks,</DIV> Thu, 07 Apr 2005 03:10:10 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992728#M18087 jkainer 2005-04-07T03:10:10Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992729#M18088 <DIV>I forgot to mention an important detail. The 2d complex fft yields expected results, the 2d real does not.</DIV> <DIV></DIV> <DIV>thanks</DIV> Thu, 07 Apr 2005 03:12:33 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992729#M18088 jkainer 2005-04-07T03:12:33Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992730#M18089 Why not provide the data and we will look at the problem. Bruce Tue, 12 Apr 2005 06:34:19 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/MKL-7-21-2d-real-fft/m-p/992730#M18089 Intel_C_Intel 2005-04-12T06:34:19Z