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Re: Re: Mathematica Animation Drives Me Crazy!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg95705] Re: [mg95681] Re: [mg95604] Mathematica Animation Drives Me Crazy!
  • From: peter <plindsay.0 at gmail.com>
  • Date: Sun, 25 Jan 2009 06:52:35 -0500 (EST)
  • References: <15010445.1232628718537.JavaMail.root@m02>

David

same results with 64-bit iMac as with 32-bit Macbook.

Peter

2009/1/24 David Park <djmpark at comcast.net>:
> This may be a platform dependent problem. In any case, I'm working on a
> 32-bit Windows Vista, Version 7.
>
> Here are some typical results of repeated Trigger activation (Trigger
> controls omitted) with the first form of the Trigger example:
>
> Module[{n = 0, nevals = 0, nlist = {}, calcnevals},
>  calcnevals[] :=
>  If[n == 0, nevals = 1; nlist = {n}, nevals = nevals + 1;
>   nlist = Append[nlist, n]];
>  {Trigger[Dynamic[n, (n = #; calcnevals[]) &], {0, 10, 1}],
>  Dynamic[n], Dynamic[nevals], Dynamic[nlist]}]
>
> 4,10,{0,1,1,1,2,2,2,3,3,4}
> 10,23,{0,1,1,1,2,2,2,3,3,3,3,4,4,4,5,6,7,7,8,8,9,10,10}
> 10,13,{0,1,2,3,4,5,6,7,8,9,9,10,10}
> 10,12,{0,1,2,3,4,5,6,7,8,9,10,10}
> 10,15,{0,1,1,2,3,4,5,6,7,7,8,8,9,10,10}
> 1,2,{0,1}
>
> Notice that in the first and last case the animation 'froze' at n = 4 and n
> = 1. The first number is the last value of n, the second number is the
> number of values that were actually produced (it should be equal to 11) and
> the third item is the list of values produced, which should be
> {0,1,2,3,4,5,6,7,8,9,10}.
>
> I would be very thankful if users on Windows Vista could try this out.
>
>
> David Park
> djmpark at comcast.net
> http://home.comcast.net/~djmpark/
>
>
>
>
> From: David Park [mailto:djmpark at comcast.net]
>
>
> I have never ending problems with Mathematica animation since Version 6.
> This takes the forms:
>
> 1) Sometimes (maybe about 10% if the time) an animation will 'stick' without
> finishing or repeating.
>
> 2) It does not seem possible to control the actual number of points or
> evaluations in the animation.
>
> 3) The documentation for the control of timing and precise steps is quite
> poor and this may be a reflection of actual buggy animation routines.
>
>
>
> Here is an example using Trigger, which is a kind of once-through animation.
> I am using an integer range, 0 to 10 in steps of 1. I would therefore like
> to have exactly 11 evaluations. But I always get an extra evaluation at the
> end, and even worse I often obtain repeat evaluations for some intermediate
> value. The following displays the value of n, the number of evaluations, and
> the actual list of n values for the evaluations.
>
>
>
> Module[{n = 0, nevals = 0, nlist = {}, calcnevals},
>
>  calcnevals[] :=
>
>  If[n == 0, nevals = 1; nlist = {n}, nevals = nevals + 1;
>
>   nlist = Append[nlist, n]];
>
>  {Trigger[Dynamic[n, (n = #; calcnevals[]) &], {0, 10, 1}],
>
>  Dynamic[n], Dynamic[nevals], Dynamic[nlist]}
>
>  ]
>
>
>
> The following uses DisplayAllSteps -> True but seems to have the same
> problem.
>
>
>
> Module[{n = 0, nevals = 0, nlist = {}, calcnevals},
>
>  calcnevals[] :=
>
>  If[n == 0, nevals = 1; nlist = {n}, nevals = nevals + 1;
>
>   nlist = Append[nlist, n]];
>
>  {Trigger[Dynamic[n, (n = #; calcnevals[]) &], {0, 10, 1},
>
>   DisplayAllSteps -> True],
>
>  Dynamic[n], Dynamic[nevals], Dynamic[nlist]}
>
>  ]
>
>
>
> Do other users see these kind of problems, especially repeat evaluations for
> some values of n?
>
>
>
> David Park
>
> djmpark at comcast.net
>
>  <http://home.comcast.net/~djmpark> http://home.comcast.net/~djmpark/
>
>
>
>
>


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