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Re: Possible bug in ListAnimate[] or Manipulate[] v6.0

  • To: mathgroup at smc.vnet.net
  • Subject: [mg85244] Re: Possible bug in ListAnimate[] or Manipulate[] v6.0
  • From: Szabolcs <szhorvat at gmail.com>
  • Date: Mon, 4 Feb 2008 03:09:45 -0500 (EST)
  • References: <fo19tv$g1a$1@smc.vnet.net>

On Feb 2, 9:34 am, "Pickett, Matthew" <matthew.pick... at hp.com> wrote:
> Dear Mathgroup folks,
>
> I think I have found a bug with ListAnimate[] (or possibly in Manipulate[]
> which is called by ListAnimate[] since the error I get is related to Manipulate[]).
>
> I can get this to happen repeatably:
>
> With a fresh kernel if I use the example from the help file on ListAnimate everything works just fine:
>
> ListAnimate[Table[Plot[Sin[n x], {x, 0, 10}], {n, 5}]]
>
> However, If 'i' is not clear:
>
> i=3;
> ListAnimate[Table[Plot[Sin[n x], {x, 0, 10}], {n, 5}]]
>
> I get the error:
>
> Manipulate::vsform: Manipulate argument \
> {{3,1,},1,5,1,AnimationRate->Automatic,DisplayAllSteps->True,\
> AppearanceElements->{ProgressSlider,PlayPauseButton,\
> FasterSlowerButtons,DirectionButton}} does not have the correct form \
> for a variable specification.
>
> My guess is that the Manipulate function requires 'i' to be clear.  My understanding is that this should not be the case since intrinsic functions should use either local variables or global variables that start with a capital letter.
>
> Can anyone else repeat this behavior?
> If so, is it a bug?
> If so, where should I report it?

Matthew,

I remember seeing complaints about this (or something similar) a long
time ago on MathGroup, but I cannot reproduce the problem now.  Have
you upgraded to version 6.0.1?

Szabolcs



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