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MathGroup Archive 2008

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Re: When is a List not a List?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg90981] Re: When is a List not a List?
  • From: roby.nowak at gmail.com
  • Date: Fri, 1 Aug 2008 03:02:05 -0400 (EDT)
  • References: <g6rntk$7kj$1@smc.vnet.net>

On 31 Jul., 09:00, AES <sieg... at stanford.edu> wrote:
>    g[x_, n_] := x^n
>    FullForm[Table[g[x, n], {n, 1, 2}]]
>    FullForm[{g[x, 1], g[x, 2]}]
>    Plot[{g[x, 1], g[x, 2]}, {x, 0, 1}, PlotStyle -> {Red, Blue}]
>    Plot[Table[g[x, n], {n, 1, 2}], {x, 0, 1}, PlotStyle -> {Red, Blue}]
>
> The FullForm[]s are identical.  One Plot[] has red and blue curves; the
> other has two blue curves.
>
> Quirky!

Plot[Evaluate[Table[g[x, n], {n, 1, 2}]], {x, 0, 1},
 PlotStyle -> {Red, Blue}]

Don't ask why ....
Has something  to do with:

Attributes[Plot]
Attributes[Table]

Out[28]= {HoldAll, Protected}

Out[29]= {HoldAll, Protected}


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