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 ************************************************************************** * Paul A. Rubin Phone: (517) 432-3509 * * Department of Management Fax: (517) 432-1111 * * Eli Broad Graduate School of Management Net: RUBIN at MSU.EDU * * Michigan State University * * East Lansing, MI 48824-1122 (USA) * ************************************************************************** Mathematicians are like Frenchmen: whenever you say something to them, they translate it into their own language, and at once it is something entirely different. J. W. v. GOETHE