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MathGroup Archive 1995

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Re: Problem with LaplaceTransform (Help !)

  • To: mathgroup at christensen.cybernetics.net
  • Subject: [mg980] Re: Problem with LaplaceTransform (Help !)
  • From: rubin at msu.edu (Paul A. Rubin)
  • Date: Thu, 4 May 1995 06:44:37 -0400
  • Organization: Michigan State University

In article <3nv8he$91e at news0.cybernetics.net>,
   gottsch at mikro.ee.tu-berlin.de (Gert Gottschalk) wrote:
->
->Hello,
->
->I am looking into filter behaviour in signal processing. To do so
->I make use of LaplaceTransform and InverseLaplaceTransform. 
->When I want results to be evaluated as in Plots I get problems
->from the transform with numerical computation error messages and
->warnings.
->
->I define:
->
->In[1]:= <<Calculus`LaplaceTransform`
->In[2]:= om[t_]:= If[t>0,1,0]
->In[3]:= q[s_] := LaplaceTransform[om[t],t,s]
->In[4]:= Plot[q[s],{s,0,100}]
->
If the problem is only with the Dirac function om[], perhaps you could try 
the standard package Calculus`DiracDelta`.  Or is it more general?

Paul

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