* You need to have **libfftw3**, development version, installed. For debian based linux systems use ``$apt install libfftw3-dev``. For other systems, please read the documentation of `fftw <http://www.fftw.org/>`_.
* You need to have **libfftw3**, development version, installed.
* For debian based linux systems use: ``$apt install libfftw3-dev``.
* For MACOS X based systems, you may use: ``sudo port install fftw-3 fftw-3-single``.
* For other systems, please read the documentation of `fftw <http://www.fftw.org/>`_.
* **ltfatpy** is using **numpy** >= 1.9, **scipy** >= 0.15 and **matplotlib** >= 1.4. For installing those packages read the instructions in: