Plot curiousities ...
- To: mathgroup at christensen.Cybernetics.NET
- Subject: [mg314] Plot curiousities ...
- From: "Dave Shreiner" <shreiner at wizard.clubfed.sgi.com>
- Date: Sun, 11 Dec 1994 23:32:07 -0500
Hi,
Plot[] seems to be a little contrary at the moment. Perhaps, its too late,
and I'm missing something, but Plot[] seems to be very picky about which lists
its willing to execute. For example, consider the following session,
> [10] math
> Mathematica 2.2 for SGI
> Copyright 1988-93 Wolfram Research, Inc.
> -- Motif graphics initialized --
>
> In[1]:= $Version
>
> Out[1]= SGI 2.2 (December 22, 1993)
>
> In[2]:= Plot[ { x, x^2, x^3 }, { x, 0, 3 }]
>
> Out[2]= -Graphics-
Here, I actually get a window with the plots in it.
> In[3]:= Plot[ Power[ x, Range[ 3 ]] // Flatten, { x, 0, 3 }]
>
> Plot::plnr: CompiledFunction[{x}, Flatten[<<1>>], -CompiledCode-][x]
> is not a machine-size real number at x = 0..
>
> Plot::plnr: CompiledFunction[{x}, Flatten[<<1>>], -CompiledCode-][x]
> is not a machine-size real number at x = 0.125.
>
> Plot::plnr: CompiledFunction[{x}, Flatten[<<1>>], -CompiledCode-][x]
> is not a machine-size real number at x = 0.25.
>
> General::stop: Further output of Plot::plnr
> will be suppressed during this calculation.
>
> Out[3]= -Graphics-
Here, I get an empty plot window, as expected from the messages.
> In[4]:= Power[ x, Range[ 3 ]] // Flatten
>
> 2 3
> Out[4]= {x, x , x }
However, this list seems to be identical to the one that I hand entered.
An undocumented feature, perhaps? This certainly isn't a critical problem, but
I would like to know if I'm the cause of the problem.
Thanks for any assistance.
--
Thanx,
Dave
---------------------------------------------------------------------------
Dave Shreiner <shreiner at sgi.com>
Silicon Graphics, Inc. (301) 572 - 1693
Can humanity butt in line for extinction?