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?

```

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