Re: difference between HeavisidePi and UnitBox
- To: mathgroup at smc.vnet.net
- Subject: [mg100286] Re: difference between HeavisidePi and UnitBox
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Sun, 31 May 2009 06:33:24 -0400 (EDT)
- References: <gvq08j$moo$1@smc.vnet.net>
Hi, what happens at x->1/2 and x->-1/2 with HeavisidePi[] and UnitBox[] ? For distributions like HeavisidePi[] that are used inside of an integral the single point does not matter. For functions like UnitBox[] it may be important. Regards Jens Anatoly wrote: > I am a very new user, and am not quite clear on the difference between > general (HeavisidePi) and numerical (UnitBox, or piecewise) functions. > > When I try to create a 5-bar pattern using one of these and apply a > FourierTransform, I have varying degrees of success... > > With HeavisidePi I can create an infinite series of them and > FourierTransform has no problems, but it doesn't like modifying the > argument as in HeavisidePi(x/w) > > With UnitBox I have the opposite issue. > > Is there a clear explanation on the difference between the two groups > of functions, and when I should use which? >