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>
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