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Re: [Help-gsl] Question about Discrete Hankel Transform

From: Hongzheng Wang
Subject: Re: [Help-gsl] Question about Discrete Hankel Transform
Date: Mon, 20 Sep 2010 17:04:40 -0400

Hi Hongcheng,

I am afraid you misunderstood the manual of GSL at this point.  Just
take a look at the following quoted sentence in the manual and make
sure you know what it means:

``compare this to the case of the discrete Fourier transform, where
samples are taken at points related to the zeroes of the sine or
cosine function.''

In fact, to do a discrete Hankel transform of a particular function f,
you just need to provide a sequence of samples of f, which normally
are obtained indeed on a uniform manner.


On Mon, Sep 20, 2010 at 3:57 PM, Hongcheng Ni <address@hidden> wrote:
> Hi everyone,
> I'm a newcomer and have a question about discrete Hankel transform (DHT)
> in GSL package.
> By reading the manual, I find that gsl_dht only supports a non-uniform
> grid system in which sampling is done on the zeros of the Bessel
> function (of the first kind) J_0.
> Does anyone know how to use it on a uniform grid? (Because changing my
> existing code from uniform sampling to non-uniform sampling would cost a
> lot of time.) Thanks!
> -
> Best regards,
> Hongcheng Ni
> JILA, University of Colorado at Boulder
> 440 UCB, Boulder, Colorado 80309-0440
> _______________________________________________
> Help-gsl mailing list
> address@hidden

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