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Re: Animation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg112644] Re: Animation
  • From: Barrie Stokes <Barrie.Stokes at newcastle.edu.au>
  • Date: Fri, 24 Sep 2010 04:10:27 -0400 (EDT)

Hi Peter

I guess you'll get around 10s of thousands of replies   :-)  to this one, but in any case the following is what I came up with in short order.

(*****)
place = RandomReal[ {0, 10}, {100, 2} ];

Manipulate[
  Graphics [{PointSize -> Large, Point[ Take[ place, i  ] ]}, 
  Frame -> True,
    PlotRange -> {{1, 10}, {1, 10}} ], {i, 1, Length[ place ], 1}]
(*****)

Hope this helps

Barrie



>>> On 23/09/2010 at 6:22 pm, in message <201009230822.EAA13282 at smc.vnet.net>,
"King, Peter R" <peter.king at imperial.ac.uk> wrote:
> I have a table of coordinates eg place={{10, 4}, {10, 7}, {10, 5}, {9, 7}}
> 
> I want to make an animation of these points which adds them successively. so 
> the following almost works (NB I know that ListAnimate would work as well and 
> is possibly preferable)
> 
> Manipulate[
>  Graphics[{PointSize -> Large, Point[place[[i]]]}, Frame -> True,
>   PlotRange -> {{1, 10}, {1, 10}}], {i, 1, 4, 1}]
> 
> in that it displays the points successively. bu what I want is for the 
> preceding points to be left visible (so the number of points grows). Needless 
> to say the above is a trivial example, in practice I could have 10s of 
> thousands of points and so want to be careful not to create very large 
> arrays.
> 
> Thanks




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