Pylab animation multiple figures

Question

I want to update multiple figures using pylab animation. I initialize a new figure for each channel to display and I set interactive mode to off using:

    pyplot.ion()
    pyplot.show()

In the class containing the figure there's a ring buffer and a method to update the data:

    def append_data(self, data):
        update buffers with data

        ...
        ...

        self.lineb.set_data(self.tbuf, self.bbuf)
        self.ax1.set_xlim( [min(self.tbuf), max(self.tbuf)] )
        self.ax1.set_ylim( [min(self.bbuf), max(self.bbuf)] )

        ...
        ...

        self.fig.show()
        pyplot.draw()

The problem: with more than one figure, only the last one updates correctly. The other ones do not refresh. I know the data is correctly added to the each figure's buffer, so the problem is not there.

avoid using `pyplot` unless you really are using it interactively. `fig.canvas.draw()` will do the same thing for a specific figure. — tacaswell, Feb 01 '14 at 00:24
I'm not sure I understand your suggestion. do you mean avoid using `pyplot`command or module? what would you use instead? — Fra, Feb 02 '14 at 07:55
It looks like you are embedding, the event loop of `pyplot` can conflict with the event loop of the your gui. — tacaswell, Feb 02 '14 at 20:24

score 0 · Answer 1 · edited May 23 '17 at 12:03

0

I found a solution following this article.

I initialized the figure with a name:

fig = pyplot.figure(name)

and then I changed the lines:

    self.fig.show()
    pyplot.draw()

to:

    pyplot.figure(name)
    pyplot.draw()

Apparently this works, not completely sure why.

edited May 23 '17 at 12:03

Community

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answered Jan 31 '14 at 23:07

Fra

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Pylab animation multiple figures

1 Answers1