Re: When is a List not a List?
- To: mathgroup at smc.vnet.net
- Subject: [mg91054] Re: When is a List not a List?
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Mon, 4 Aug 2008 03:27:17 -0400 (EDT)
- Organization: Uni Leipzig
- References: <g6rntk$7kj$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
try
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[Evaluate[Table[g[x, n], {n, 1, 2}]], {x, 0, 1},
PlotStyle -> {Red, Blue}]
because Plot[] has the attribute HoldAll, it find not out that
the evaluate version of Table[g[x, n], {n, 1, 2}] is a list.
Regards
Jens
AES 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!
>