Hi Sven,
but I just want to do a fft, extract critical bands and some other
analysis
- feature extraction in general. all that can be done using Numeric Python
which is a highly optimized package for number crunching tasks. that package is written in c and I wouldn't get it much faster if I wrote an external in c than just using numpy.
i see... i'm afraid there's no such connection in PD yet... this is planned to be integrated into a future version of vasp. Have you tried if the current vasp version can help you with your project?
best greetings, Thomas