Hi Hongzheng, Thank you for your reply!
However, look at the third formula in that section (32.1) of the manual, gsl_dht does require the values of function f at zeros of Bessel function J_nu. - Best regards, Hongcheng Ni JILA, University of Colorado at Boulder 440 UCB, Boulder, Colorado 80309-0440 On Mon, 2010-09-20 at 17:04 -0400, Hongzheng Wang wrote: > 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. > > HZ > > On Mon, Sep 20, 2010 at 3:57 PM, Hongcheng Ni <[email protected]> > 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 > > [email protected] > > http://lists.gnu.org/mailman/listinfo/help-gsl > > _______________________________________________ Help-gsl mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gsl
