Hi, On Tue, 17 Mar 2009 11:14:15 +0200 Shuman Serle <[email protected]> wrote:
> If I have an unevenly spaced complex dataset (its generated by an > adaptive ODE solver), can I use it with the FFT transforms, OR do I > need to apply an interpolation method in order to retrieve evenly > spaced points first. The documentation examples don't make this > clear. Next question is how do I re-pack the array to allow the FFT > algorithm to work. all standard DFT routines require evenly spaced data. If your data is unevenly spaced then you have to apply a Non-uniform Discrete Fourier Transform (NDFT), see for example http://www-user.tu-chemnitz.de/~potts/nfft/ Interpolating the data is probably not a good idea. Heiko -- -- Wir bewältigen unseren Alltag fast ohne das geringste Verständnis der -- Welt. (Carl Sagan) -- Cluster Computing @ http://www.clustercomputing.de -- Heiko Bauke @ http://www.mpi-hd.mpg.de/personalhomes/bauke _______________________________________________ Help-gsl mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gsl
