ANother plot2d bug - can't plot limit sin(x)/x=1 when x->0
Subject: ANother plot2d bug - can't plot limit sin(x)/x=1 when x->0
From: synthespian
Date: Fri, 15 Mar 2002 14:20:44 -0300 (BRT)
U-E59264-Osman F Buyukisik writes:
> synthespian writes:
> > Hi-
> >
> > I can't do:
> >
> > (C1) f2(x):=(sin(x)/x,x,1);
> > (C2) plot2d(f2(x),[x,-1,1]);
> >
> > Note that:
> >
> > x (rad) y=sin(x)/x
> > +/- 1.0 0.84147
> > 0.9 0.87036
> > 0.8 0.89670
> > 0.7 0.92031
> > 0.5 0.94107
> > 0.4 0.95885
> > 0.3 0.97365
> > 0.2 0.98507
> > 0.1 0.99335
> > 0.01 0.99998
> >
> >
> > What's plotted has a 90 degrees angle! I mean, really!
> > (And I begin to wonder if xmaxima will help me pass my Calculus
> > class...)
> > What's with plot2d?? What was the _last version_ when it was
>
> Maxima 5.5 with gcl 2.3.8 seems to working OK. I get a fine plot:
>
> (C12) f2(x):=sin(x)/x;
>
> SIN(x)
> (D12) f2(x) := ------
> x
> (C13) plot2d(f2(x),[x,-1,1]);
>
>
> Why did you use
> f2(x):=(sin(x)/x,x,1);
> instead of what I have above?
>
> Osman
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