Re: Re: Problem using Evaluate[] inside a Plot command. 5.1

*To*: mathgroup at smc.vnet.net*Subject*: [mg54214] Re: [mg54201] Re: Problem using Evaluate[] inside a Plot command. 5.1*From*: Chris Chiasson <chris.chiasson at gmail.com>*Date*: Sun, 13 Feb 2005 22:17:02 -0500 (EST)*References*: <cu78ub$me9$1@smc.vnet.net> <200502130521.AAA03706@smc.vnet.net>*Reply-to*: Chris Chiasson <chris.chiasson at gmail.com>*Sender*: owner-wri-mathgroup at wolfram.com

Suggestion: Use block to set the value of t to whatever plot said caused an error. Call the function from within this block. If it looks like a number, check its full form. On Sun, 13 Feb 2005 00:21:31 -0500 (EST), D Herring <dherring at at.uiuc.dot.edu> wrote: > Hi Nasser, > > Maybe Evaluate[OutputResponse[sys,UnitStep[t], t]] is returning a value > which needs to be Evaluate[]d again before it can be plotted? > > I've never had your problem (don't even have the control toolbox), but > maybe > > Plot[{t2, Evaluate[Evaluate[OutputResponse[sys,UnitStep[t], t]]]}, > {t, 0, 3}, PlotRange -> All] > > might work? > > Your error message, "plot::plnr: .... is not a machine-size real > number at t=...." usually indicates the need to Evaluate[] one of the > Plot[] arguments. > > Good luck, > Daniel > > -- Chris Chiasson Kettering University Mechanical Engineering Graduate Student 1 810 265 3161

**References**:**Re: Problem using Evaluate[] inside a Plot command. 5.1***From:*D Herring <dherring@at.uiuc.dot.edu>