Re: Re: FourierTransform of Sinc Function

*To*: mathgroup at smc.vnet.net*Subject*: [mg44359] Re: [mg44311] Re: FourierTransform of Sinc Function*From*: "Kieng" <Sorasak at brown.edu>*Date*: Fri, 7 Nov 2003 05:16:03 -0500 (EST)*References*: <200310281053.FAA25777@smc.vnet.net> <bo7of6$ag8$1@smc.vnet.net> <200311051500.KAA26329@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

I am sorry my question is apparently not so clear. I generated a list of data from a sinc function. I am not doing the transform from the sinc function. If I use Fourier[list of the data], and plot the result, her is where I am kind of not sure why I don't get a top hat function, even though I used very fine step for my sinc function data. ----- Original Message ----- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de> To: mathgroup at smc.vnet.net Subject: [mg44359] [mg44311] Re: FourierTransform of Sinc Function > Hi, > > what is mysterious on > > In[]:=FourierTransform[Sin[w*x]/x, x, k] > > Out[]=(Sqrt[Pi/2]*(-Sign[k - w] + Sign[k + w]))/2 > > Regards > Jens > > Kieng wrote: > > > > Dear All, > > > > I tested the Fourier Function on a sinc function which should give the > > top-hat but mathatmatica gave some mysterious plot that I don't understand. > > Anyone knows what is going on. > > > > Thank you very much, > > Sorasak >

**Follow-Ups**:**Re: Re: Re: FourierTransform of Sinc Function***From:*Yasvir Tesiram <yat@omrf.ouhsc.edu>

**References**:**Re: FourierTransform of Sinc Function***From:*Jens-Peer Kuska <kuska@informatik.uni-leipzig.de>