[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Help-gsl] Does anybody know how to use FFT to compute numerical int
Re: [Help-gsl] Does anybody know how to use FFT to compute numerical integration?
Thu, 28 Jun 2007 19:46:02 -0700
Thanks! I probably have to do a smarter FFT... otherwise I don't think
a plain discretization of the function and then take FFT I will be
able to obtain a good Fourier integral. Fourier integral are hard
integrals and I have met with enough numerical instability and
difficulties... I am really looking for smarter FFT to do the
Thanks a lot!
On 6/28/07, Evgeny Kurbatov <address@hidden> wrote:
The sufficient example of interpolation is on
But you can realize your own minimal and efficient linear interpolation
on the grid with given mappings v(i) and i(v). If the mapping i(v) is
known, you will not need for lookup of index 'i' by variable 'v', so it
will be fast...
> It doesn't seem to be efficient to me? Will the interpolation be fast?
> How do you handle it? Thanks!