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MathGroup Archive 1998

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Re: How to use HoldForm within Module

  • To: mathgroup at
  • Subject: [mg15273] Re: [mg15259] How to use HoldForm within Module
  • From: Ken Levasseur <Kenneth_Levasseur at>
  • Date: Thu, 31 Dec 1998 04:39:29 -0500
  • Organization: UMass Lowell Mathematical Sciences
  • References: <>
  • Sender: owner-wri-mathgroup at


In addition to your definition of doNOTCHANGE, if you add HoldFirst (or
HoldAll) to the Attributes of doNOTCHANGE, you should get what you
 You set the attributes this way:


Ken Levasseur
Math. Sci. UMass Lowell

Chee Lim Cheung wrote:
> Hello Mathematica gurus,
> I am new to Mathematica. I need to use a function in its original form
> within Module.
> e.g.,doNOTCHANGE[f_]:=Module[{g},g=HoldForm[f];Print[g]]
> may not give what I want as f is already rearranged according to
> Mathematica's lexicographical order within Module,i.e.,HoldForm[f] in
> Module may not be exactly of the same form as f as defined. One example
> is f=-1(UnitStep[t-1]-UnitStep[t-2]).Can any of you out there show me
> the way to get f in its original form inside Module?
> Thanks
> Chee

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