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MathGroup Archive 2007

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Re: About UnitStep and ZeroValue

  • To: mathgroup at smc.vnet.net
  • Subject: [mg76098] Re: [mg76034] About UnitStep and ZeroValue
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Wed, 16 May 2007 05:30:26 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200705150851.EAA16806@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

Perhaps:

   Unprotect[UnitStep]
   UnitStep[0]=3;
   Protect[UnitStep]



solidifire wrote:
> In Mathematica 3.0, UnitStep is defined in package
> Calculus`DiracDelta`
> and there is an option named ZeroValue, which enables the user to
> define
> the value of UnitStep[0].
> 
> http://documents.wolfram.com/v3/AddOns/Calc_DiracDelta-.html
> or
> http://tinyurl.com/35rtl7
> 
> In Mathematica 5.0, UnitStep is a built-in function and the default
> value of UnitStep[0] is 1. It seems that ZeroValue is no longer
> accessible. Is there any method of changing this default value?
> 
> Thank you in advance.
> 
> 

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305


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