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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg85230] Re: [mg85214] Possible bug in ListAnimate[] or Manipulate[] v6.0
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Sat, 2 Feb 2008 23:32:56 -0500 (EST)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200802020828.DAA16208@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

I am not getting any kind of error from:

   i=3;
   ListAnimate[Table[Plot[Sin[n x], {x, 0, 10}], {n, 5}]]

Pickett, Matthew 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?
> 
> 
> 
> Best,
> Matthew Pickett
> 

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305


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