> Florian Schopper wrote:
> >
> > Hey Rooters,
> >
> > just a very short question:
> > Is Fast-Fourier-Tranform or convolution implemented in root, or has anyone
> > a c++ library which can be easily linked?
> >
> > thanks,
> > Florian Schopper
> >
>
> Hi Florian,
> Since I use ROOT also for my teaching I might soon need fast
> Fourier transforms in C++.
> Currently I am not aware of existing stuff, so I have in mind
> to make my own ones (based on Numerical recipes) just like
> I recently did for the Chi2 probab. function and the Gamma
> functions etc...
> I can't guarantee any timescale, but my intention is to work
> on it during the coming Xmass holidays.
> Of course if anyone has already something, I would be interested
> to know.
> --
>
> Cheers,
>
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>
> *----------------------------------------------------------------------*
> Dr. Nick van Eijndhoven Department of Subatomic Physics
> email : nick@phys.uu.nl Utrecht University / NIKHEF
> tel. +31-30-2532331 (direct) P.O. Box 80.000
> tel. +31-30-2531492 (secr.) NL-3508 TA Utrecht
> fax. +31-30-2518689 The Netherlands
> WWW : http://www.phys.uu.nl/~nick Office : Ornstein lab. 172
> ----------------------------------------------------------------------
> tel. +41-22-7679751 (direct) CERN PPE Division / ALICE exp.
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> fax. +41-22-7679480 Switzerland
> CERN beep : 13+7294 Office : B 160 1-012
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>
I am using FFT routines I developped in C/C++ from several sources.
They were tested and checked.
Let me just comment them and you will get them attached to my next
mail.
Faouzi
PS: some bugs exist in the C-version of the Numerical recipes