{"id":18840156,"url":"https://github.com/fortran-lang/fftpack","last_synced_at":"2026-02-08T21:01:55.700Z","repository":{"id":40452148,"uuid":"8332666","full_name":"fortran-lang/fftpack","owner":"fortran-lang","description":"Double precision version of fftpack","archived":false,"fork":false,"pushed_at":"2025-07-22T20:33:41.000Z","size":2321,"stargazers_count":78,"open_issues_count":9,"forks_count":20,"subscribers_count":15,"default_branch":"main","last_synced_at":"2025-07-22T22:21:26.019Z","etag":null,"topics":["fast-fourier-transform","fft","fft-library","fftpack","fortran-library","fortran-package-manager"],"latest_commit_sha":null,"homepage":"https://fortran-lang.github.io/fftpack/","language":"Fortran","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/fortran-lang.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2013-02-21T10:07:23.000Z","updated_at":"2025-07-22T20:32:37.000Z","dependencies_parsed_at":"2023-02-03T09:45:31.859Z","dependency_job_id":"c2216936-8950-42b2-a5c5-0d979b14f367","html_url":"https://github.com/fortran-lang/fftpack","commit_stats":null,"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"purl":"pkg:github/fortran-lang/fftpack","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fortran-lang%2Ffftpack","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fortran-lang%2Ffftpack/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fortran-lang%2Ffftpack/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fortran-lang%2Ffftpack/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/fortran-lang","download_url":"https://codeload.github.com/fortran-lang/fftpack/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fortran-lang%2Ffftpack/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":270033301,"owners_count":24515475,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-08-12T02:00:09.011Z","response_time":80,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["fast-fourier-transform","fft","fft-library","fftpack","fortran-library","fortran-package-manager"],"created_at":"2024-11-08T02:45:14.232Z","updated_at":"2026-02-08T21:01:50.616Z","avatar_url":"https://github.com/fortran-lang.png","language":"Fortran","funding_links":[],"categories":[],"sub_categories":[],"readme":"![FFTPACK](media/logo-text-background.png)\n\n# FFTPACK\n\nA package of Fortran subprograms for the fast Fourier transform of periodic and other symmetric sequences.\n\n[![Actions Status](https://github.com/fortran-lang/fftpack/workflows/fpm/badge.svg)](https://github.com/fortran-lang/fftpack/actions)\n[![Actions Status](https://github.com/fortran-lang/fftpack/workflows/doc-deployment/badge.svg)](https://github.com/fortran-lang/fftpack/actions)\n[![CMake](https://github.com/fortran-lang/fftpack/actions/workflows/cmake.yml/badge.svg?branch=main)](https://github.com/fortran-lang/fftpack/actions/workflows/cmake.yml)\n\n## Getting started\n### Get the code\n```bash\ngit clone https://github.com/fortran-lang/fftpack.git\ncd fftpack\n```\n\n### Build with [fortran-lang/fpm](https://github.com/fortran-lang/fpm)\nFortran Package Manager (fpm) is a package manager and build system for Fortran.   \nYou can build using provided `fpm.toml`:\n```bash\nfpm build\nfpm test --list\nfpm test \u003ctest_name, see `fpm.toml` or list\u003e\n```\nTo use `fftpack` within your `fpm` project, add the following to your `fpm.toml` file:\n```toml\n[dependencies]\nfftpack = { git=\"https://github.com/fortran-lang/fftpack.git\" }\n```\n\n## Build with CMake\nThis library can also be built using CMake.  For instructions see [Running CMake](https://cmake.org/runningcmake/).  CMake version 3.24 or higher is required.\n\n## Build with Meson\nThis library can also be built using Meson. The following dependencies are required:\n- a Fortran compiler\n- [meson](https://mesonbuild.com) version 0.57 or newer\n- a build-system backend, *i.e.* [ninja](https://ninja-build.org) version 1.7 or newer\n\nSetup a build with\n\n```sh\nmeson setup build\n```\n\nYou can select the Fortran compiler by the `FC` environment variable.\nTo compile and run the projects testsuite use\n\n```sh\nmeson test -C build --print-errorlogs\n```\n\nIf the testsuite passes you can install with\n\n```sh\nmeson configure build --prefix=/path/to/install\nmeson install -C build\n```\n\n## Documentation\nSee the our [GitHub Pages site] for documentation generated by [FORD] from the fortran-lang/fftpack [project file].\n\n## References \nAlthough fortran-lang is _not_ interface-compatible with any of the following libraries, each contains documentation that might be useful for different reasons:\n\n* **Recommended reference:** The [scipy.fftpack] documentation contains succinct description of the storage sequences for function results that match those in fortran-lang/fftpack, e.g., the location of the real and imaginary parts of the `rfft` function result.\n* **Theory reference:** The [documentation for the GNU/gsl FFT routines], which are also based on netlib/fftpack, provides some useful definitions of FFT terminology and represenations of the analytical forms of the Discrete Fourier Transform nicely formatted by [LaTeX].\n* **Historical reference:** The [netlib/fftpack] library on which fortran-lang/fftpack is useful for understanding several fortran-lang/fftpack design choices, e.g., the procedure dependencies.\n\n[FORD]: https://github.com/Fortran-FOSS-Programmers/ford\n[project file]: ./API-doc-FORD-file.md\n[scipy.fftpack]: https://docs.scipy.org/doc/scipy/reference/fftpack.html\n[documentation for the GNU/gsl FFT routines]: https://www.gnu.org/software/gsl/doc/html/fft.html#\n[netlib/fftpack]: http://www.netlib.org/fftpack/\n[LaTeX]: https://www.latex-project.org\n[GitHub Pages site]: https://fortran-lang.github.io/fftpack/\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffortran-lang%2Ffftpack","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffortran-lang%2Ffftpack","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffortran-lang%2Ffftpack/lists"}