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: U-E59264-Osman F Buyukisik
Date: Mon, 11 Mar 2002 08:40:32 -0500 (EST)
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