I can configure, compile and run this tclfftw package (https://gitlab.com/teclabtcltk/tclfftw) unless I enable TCL stubs. Environment: Windows msys2 mingw64 Tcl86 As a workaround I had to do some ...

I am trying to use FFTw3 in Visual Studio using the Intel Fortran compiler. I am confused about normalization. I have setup a r2r spectral to grid plan for sinx siny components. ...

trying to get fftw to work. I'm on an M2 macbook, used brew to install fftw. Within my IDE, #include <fftw3.h> doesn't throw an error, and autocomplete correctly lists fftw constants and ...

I'm using the FFTW library in C++, and now need to use it in Python. The common approach to this seems to be the pyFFTW library. I've found a difference between the outputs of very basic programs ...

I am working with a C programming code in 2D implemented with spectral method fftw3 package which by default considers periodic boundary condition. The code works with a single index ij = i*nx + j. ...

I'm trying to build a fftw dynamic library for macOS/x86 on a macOS/arm system. I am able to build a dynamic library for arm and a static library for x86, but unable to build a dynamic library for x86....

Cuda does not have any direct implementation of 4D FFT. Hence I want to decompose a 4D FFT into 4 x 1D FFTs into X, Y, Z, and W dimensions. I understand that the cufftPlanMany API is best suited for ...

I'm developing a Max/MSP external on MacOS... in fact, I'm porting a Max/MSP external that I developed on Windows (Visual Studio 2022 toolchain) onto MacOS using Cmake and Clang. The Max external ...

I am using the advance interface of FFTW combined with MPI in order to perform several 1D forward and backward transforms at a time. When the transform is complex to complex (both input and output ...

I have a simple function that performs a sliding dot product using an overlap-add convolution approach: import numpy as np from scipy.signal import oaconvolve import pyfftw import os def ...

I have a very simple 3D in-place FFT transform code with FFTW and openmp multi-thread support. I tried to get the best performance in a linux machine (Ubuntu with AMD Genoa CPUs -2 sockets). I built ...

Does the following violate strict aliasing rule in C? #include <stdint.h> #include <stdio.h> #include <stdlib.h> int ialignment_of(double *p) { return (int)(((uintptr_t) p) % ...

When using the fftw3 fast fourier transform (FFT) library, a plan variable is declared and initialised, it is then used to perform some FFTs and subsequently destroyed when the memory is to be freed: #...

I am trying to figure out how to match the output from FTTW to OpenCV's 2D DCT. It looks like the output is scaled in some way related to square root of the number of rows and columns, if the rows or ...

On Linux 64, after creating an environment, I installed gfortran with conda install conda-forge::gfortran. I see that it installed gfortran 14 and gcc 14. Then I installed openmpi with conda install ...