On 1 April 2013 22:53, John Denker <[email protected]> wrote: > ++ There is also a zeropad(...) function, which makes it easy > for folks to pad their data so that the number of rows is a > power of 2. This lays a foundation for the future. We should > not be training users to expect that our FFT will always require > powers of 2.
I've been using fftw in my code with success: http://www.fftw.org/ It's a GPL fft library. It's very quick, very accurate and (relevant here) supports arbitrary-sized transforms. This might be an easy way to remove the power-of-two issue. It also supports real->complex and complex->real half transforms, which might be interesting. You'd need to add extra options for that, of course. John _______________________________________________ gnumeric-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/gnumeric-list
