Re: weird Manipulate/Animate
- To: mathgroup at smc.vnet.net
- Subject: [mg76693] Re: [mg76682] weird Manipulate/Animate
- From: "Lev Bishop" <lev.bishop at gmail.com>
- Date: Sat, 26 May 2007 04:22:31 -0400 (EDT)
- References: <200705251050.GAA08454@smc.vnet.net>
On 5/25/07, mire <virgiliub at yahoo.com> wrote:
> does anyone know why this code works
>
> graph = Table[Plot[Sin[x + i], {x, 0, \[Pi]}], {i, 3}];
> ListAnimate[graph]
>
> and this one doesn't
>
> n = 3; graph = Table[0, {n}];
> For[i = 1, i <= n, i++,
> graph[[i]] = Show[Plot[Sin[x + i], {x, 0, \[Pi]}]]];
> ListAnimate[Evaluate[graph]]
Heh. Because even WRI can't remember mathematica's bizarre and
confusing scoping rules?
A more succinct example of the problem:
i=1;
ListAnimate[{"a","b","c"}]
Ie, the problem is that ListAnimate gets tripped up by Global`i.
Somewhere in the definition of ListAnimate is this:
Manipulate`Dump`res=With[{Manipulate`Dump`i=Symbol[i],....] ,
which almost makes it look as though this is on purpose, but I can't see why.
Anyway, for now, just don't use the variable i in any situation where
you might use ListAnimate.
Lev
- References:
- weird Manipulate/Animate
- From: mire <virgiliub@yahoo.com>
- weird Manipulate/Animate