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MathGroup Archive 2007

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Re: About UnitStep and ZeroValue

  • To: mathgroup at smc.vnet.net
  • Subject: [mg76080] Re: About UnitStep and ZeroValue
  • From: dh <dh at metrohm.ch>
  • Date: Wed, 16 May 2007 05:21:13 -0400 (EDT)
  • References: <f2bsqj$gon$1@smc.vnet.net>


Hi,

in principal you can unprotect UnitStep and redefine it. However, I 

would not advice this, but roll my onw by defining a new function with 

the desired features.

hope this helps, Daniel



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.

> 

> 




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