Errors While Creating Simple Graph

• To: mathgroup at smc.vnet.net
• Subject: [mg8282] Errors While Creating Simple Graph
• From: ironwolf at dangerousgames.com (Ironwolf)
• Date: Sun, 24 Aug 1997 04:46:22 -0400
• Organization: Somewhere Out There
• Sender: owner-wri-mathgroup at wolfram.com

```When I ask Mathematica (2.2) to perform the following plot, it works as
expected, drawing a plot of two intersecting lines:

In[1]:=
Plot[{x + 1, 2x - 1}, {x, 0, 5}]

Out[1]=
-Graphics-

However, when I use substitution to provide the list of equations,
something goes wrong, and the resulting graph is empty:

In[2]:=
{x + 1, 2x - 1}

Out[2]=
{1 + x, -1 + 2 x}

In[3]:=
Plot[%2, {x, 0, 5}]

Plot::plnr: CompiledFunction[{x}, <<1>>, -CompiledCode-]
[<<1>>] is not a machine-size real number at x = 0..
Plot::plnr: CompiledFunction[{x}, <<1>>, -CompiledCode-]
[<<1>>] is not a machine-size real number at x =
0.208333.
Plot::plnr: CompiledFunction[{x}, <<1>>, -CompiledCode-]
[<<1>>] is not a machine-size real number at x =
0.416667.
General::stop:
Further output of Plot::plnr
will be suppressed during this calculation.

Out[3]=
-Graphics-

This seems improper. Can anyone provide an explanation of this behavior? Thanks.

======================================================================
Robert McNally <mailto:ironwolf at dangerousgames.com>
Visit <http://personalweb.lightside.com/pfiles/mcnally1.html>
----------------------------------------------------------------------
Finger for my PGP Key -- Protect Your Crypto-Rights! * Free Speech!
Unsolicited Commercial E-Mail Sucks! * Visit http://www.vtw.org
======================================================================

```

• Prev by Date: [Q] Pink noise in software
• Next by Date: Re: Need package for Lyapunov exponents
• Previous by thread: [Q] Pink noise in software
• Next by thread: Re: Errors While Creating Simple Graph