Re: Problem plotting a piecewise function

*To*: mathgroup at smc.vnet.net*Subject*: [mg14519] Re: Problem plotting a piecewise function*From*: buttgereit at netcologne.de (Peter Buttgereit)*Date*: Thu, 29 Oct 1998 04:33:16 -0500*Organization*: Dipl.-Sportl. Peter Buttgereit*References*: <70ras4$sge@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

[This followup was posted to comp.soft-sys.math.mathematica and a copy was sent to the cited author.] Hi Sergio, it is because Mathematica by default tries to select a region of most interest in a plot. Evaluate this to see that your function works properly: Plot[ Evaluate[f[x]], {x,Xa,Xb}, PlotRange->All, (*this turns off the mentioned default*) Frame->{True,True,False,False}, Axes->False (*the Axes and Frame statements make it easier to see that f=0 for x>1.5*) ] For more details about this feature see Tom Wickham-Jones' "Mathematica Graphics", Telos, 1994. Cheers, Peter