[Matplotlib-users] Newbie Q re: Lorenz attractor

Discussion:

Prahas David Nafissian

2015-03-08 21:31:49 UTC

Hi,

I want to create an animation of the Lorenz attractor,
plotting each new point as it is generated by the
equations. So we see the graph "being drawn"
over time.

Also, as it is being drawn, I want to be able to
rotate the screen in 3 dimensions.

Will MatPlot do this on a Mac (10.8.5)?

Thanks!

PS -- here is code using MatPlot to create the "full" Lorenz:

http://matplotlib.org/examples/mplot3d/lorenz_attractor.html

Amit Saha

2015-03-09 00:59:09 UTC

Permalink

On Mon, Mar 9, 2015 at 7:31 AM, Prahas David Nafissian

Post by Prahas David Nafissian
Hi,
I want to create an animation of the Lorenz attractor,
plotting each new point as it is generated by the
equations. So we see the graph "being drawn"
over time.

You will very likely need to use the animation API for this. I
recently tried to demonstrate the Henon function in a fashion that it
appears I am drawing it over time:

You can see the code linked from there:
https://github.com/amitsaha/playground/blob/master/recipes/henon_animation.py

That might give you a starting point of what you are trying to do.

Post by Prahas David Nafissian
Also, as it is being drawn, I want to be able to
rotate the screen in 3 dimensions.

Sorry, nothing much I can add here.

Best,
Amit.

--
http://echorand.me

Benjamin Root

2015-03-09 02:14:54 UTC

Permalink

Yes, absolutely it will work... so long as you do not use blitting.
Blitting for mplot3d is pretty much useless anyway (I think draws of the
axes occur anyway regardless of the blit mode), but it is also broken for
the macosx backend, anyway.

Cheers!
Ben Root

Post by Amit Saha
On Mon, Mar 9, 2015 at 7:31 AM, Prahas David Nafissian

Post by Prahas David Nafissian
Hi,
I want to create an animation of the Lorenz attractor,
plotting each new point as it is generated by the
equations. So we see the graph "being drawn"
over time.

You will very likely need to use the animation API for this. I
recently tried to demonstrate the Henon function in a fashion that it
http://youtu.be/76ll818RlpQ
https://github.com/amitsaha/playground/blob/master/recipes/henon_animation.py
That might give you a starting point of what you are trying to do.

Post by Prahas David Nafissian
Also, as it is being drawn, I want to be able to
rotate the screen in 3 dimensions.

Sorry, nothing much I can add here.
Best,
Amit.
--
http://echorand.me
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Prahas David Nafissian

2015-03-09 13:30:22 UTC

Permalink

Dear Ben, Amit, and Ryan,

Thanks so much for your input! Looking forward to
finding the time to give it a go!

Best,

--Prahas

Yes, absolutely it will work... so long as you do not use blitting. Blitting
for mplot3d is pretty much useless anyway (I think draws of the axes occur
anyway regardless of the blit mode), but it is also broken for the macosx
backend, anyway.
Cheers!
Ben Root

Post by Amit Saha
On Mon, Mar 9, 2015 at 7:31 AM, Prahas David Nafissian

Post by Prahas David Nafissian
Hi,
I want to create an animation of the Lorenz attractor,
plotting each new point as it is generated by the
equations. So we see the graph "being drawn"
over time.

Post by Prahas David Nafissian
Also, as it is being drawn, I want to be able to
rotate the screen in 3 dimensions.