Re: [Matplotlib-users] Update some part of a figure

[Christophe B. <pro...@gm...>]

Hello,

I have a good news for the Mac users who want to play with animations. I've
reinstalled Maverick OS on my Mac without any softwares, this is called a
clean installation, and then I've installed Anaconda, and XQuark (see
this<http://support.apple.com/kb/ht5293>
).

To make animations work, you just have to use the following two lines
before any other matplotlib imports.

import matplotlib
matplotlib.use('TkAgg')

I think this will work for any Mac OS supported by Anaconda. The use of
XQuark is only needed for Maverick.


2014-03-12 12:17 GMT+01:00 Christophe Bal <pro...@gm...>:

> I forgot to say that being under Mac O$, I can use with animate... So I do
> not know if i can build an infinite animation. Is it possible ?
>
>
> 2014-03-12 12:01 GMT+01:00 Christophe Bal <pro...@gm...>:
>
> Yes I've read it.
>>
>>
>>    1. It proposes to update infos about the figure, this is what I do in
>>    my update function which only change the color of one random rectangle
>>    every time that a timer asks to do it.
>>    2. Then it is said to use plt.draw(), which is what I do. If I use a
>>    timer, each draw takes merely 2 seconds for 64**2 fixed initial
>>    squares instead of being very quick for 16**2 fixed initial squares. It is
>>    certain that the draw is indeed a redraw.
>>
>>
>>
>> 2014-03-12 11:49 GMT+01:00 Derek <gam...@gm...>:
>>
>> Did you look at the link; the person updating the plots had the same
>>> issue - i.e. he did not know when the data would arrive or how long it
>>> would be active for.  That sounds like your situation?
>>>
>>>
>>> On 12 March 2014 11:59, Christophe Bal <pro...@gm...> wrote:
>>>
>>>> I forgot to say that here the use of animations is not good because, I
>>>> have no max playing time.
>>>>
>>>>
>>>> 2014-03-12 10:56 GMT+01:00 Christophe Bal <pro...@gm...>:
>>>>
>>>> Hello.
>>>>>
>>>>> First of all, I forgot the link to my post : here it is<http://stackoverflow.com/questions/22320407/matplotlib-update-only-some-parts-of-a-figure>
>>>>> .
>>>>>
>>>>> Yes, for pedagogical reason, I would like to use matplotlib for
>>>>> beginner programmers, like me :-), such as to do some 80 old school games.
>>>>>
>>>>> The problem I met using the draw method is that it takes 2 seconds for
>>>>> a figure of 64**2 squares. This is due to the fact that everythin is
>>>>> redraw. Here is my update method.
>>>>>
>>>>> *------------------------------------------------*
>>>>> *def update():*
>>>>> *    global colors, width, height*
>>>>>
>>>>> *    x = randint(0, width - 1)*
>>>>> *    y = randint(0, height - 1)*
>>>>>
>>>>> *    plotgrid[y][x].set_facecolor(choice(colors))*
>>>>>
>>>>> *    plt.draw()*
>>>>>
>>>>>
>>>>>
>>>>> 2014-03-12 10:44 GMT+01:00 Derek <gam...@gm...>:
>>>>>
>>>>> Its not really clear what you are trying to achieve (using Matplotlib
>>>>>> to play Tetris??); but this have some pointers:
>>>>>>
>>>>>>
>>>>>> http://stackoverflow.com/questions/10944621/dynamically-updating-plot-in-matplotlib
>>>>>>
>>>>>>
>>>>>> On 12 March 2014 11:33, Christophe Bal <pro...@gm...> wrote:
>>>>>>
>>>>>>> Hello.
>>>>>>>
>>>>>>> I've poste here a question but no one seems to have an hint to give
>>>>>>> so I repeat my question here.
>>>>>>>
>>>>>>> In the attached Python 3 code, I draw n**2 squares in black and then
>>>>>>> I dynamically change in a random way the colors of some squares.
>>>>>>>
>>>>>>> The problem I met is that at each new random choice, I redraw all
>>>>>>> the squares. I know that it is stupid for large number of squares.
>>>>>>>
>>>>>>> Is there a way to change some propriety of one square, and then to
>>>>>>> ask to matplotlib to redraw only what have changed ? I'm looking for
>>>>>>> something similar to `blint` for animations.
>>>>>>>
>>>>>>> Christophe BAL
>>>>>>>
>>>>>>>
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>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>