Re: Taking the Log causing Mathematica kernel crash.

*To*: mathgroup at smc.vnet.net*Subject*: [mg57057] Re: Taking the Log causing Mathematica kernel crash.*From*: "Nasser Abbasi" <nma at 12000.org>*Date*: Fri, 13 May 2005 01:18:50 -0400 (EDT)*References*: <d615dg$nn1$1@smc.vnet.net>*Reply-to*: "Nasser Abbasi" <nma at 12000.org>*Sender*: owner-wri-mathgroup at wolfram.com

Hi; I think in my earlier post I did not convert the cell to INPUT FORM before posting it. The code I posted seems magled up a little. Trying again. Is this one is supposed to post Mathematica code? convert to INPUT FORM first? Clear["Global`*"] f[t_] := Sin[3.5*t] + 2*Cos[2*t]; g[t_] := Piecewise[{{0, t < -2*Pi}, {f[t], t >= -2*Pi && t <= 2*Pi}, {0, t > 2*Pi}}]; c[w_] := Integrate[g[t]*Exp[(-I)*w*t], {t, -Infinity, Infinity}]; Plot[20*Log[10, Abs[c[w]]], {w, -5, 5}, PlotRange -> All] thanks, Nasser "me" <nma at 12000.org> wrote in message news:d615dg$nn1$1 at smc.vnet.net... > Mathematica 5.1 on Windows. > > Clear["Global`*"] > f[t_] := Sin[3.5 t] + 2 Cos[2 t]; > g[t_] := Piecewise[{{0, t < -2Pi}, { f[t], t = -2Pi && t = 2Pi}, {0, t > > 2Pi}}]; > c[w_] := Integrate[ g[t] Exp[-I w t], {t, -Infinity, Infinity}] ; > Plot[20 Log[10, Abs[c[w]]], {w, -5, 5}, PlotRange -> All] > > The above code causes Mathemtica kernel crash. > > Change the last line above to remove the Log, then it is OK: > > Plot[20 Abs[c[w]], {w, -5, 5}, PlotRange -> All] > > Nasser > >

**Follow-Ups**:**Re: Re: Taking the Log causing Mathematica kernel crash.***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>