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From: MRAB <python@mrabarnett.plus.com>
Newsgroups: comp.lang.python
Subject: Re: Old matplotlib animation now fails
Date: Wed, 16 Oct 2024 00:38:01 +0100
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On 2024-10-15 21:16, Martin Schöön via Python-list wrote:
> Some years ago I created a Python program that reads GPS data and
> creates an animation stored in an mp4 file. Not very elegant but it
> worked. Not very original as it was based on the example found here:
>
> https://shorturl.at/dTCZZ
>
> Last time it worked was about a year ago. Since then I have moved to a
> later version of Debian and Conda and as a consequence a later version
> of Python 3 (now 3.12.2).
>
> Now my code fails. I have downloaded the latest version of the example
> and it also fails.
>
> It is the second to last line that throws an error:
>
> l.set_data(x0, y0)
>
> The error messages drills down to something called
> "/home/.../matplotlib/lines.py", line 1289, in set_xdata
>
> and tells me 'x must be a sequence'
>
> I have started to dig around in matplotlib's documentation but my
> strategy is clearly wanting. I don't really know where to start
> looking for information on how to correct my code. Hence, this
> call for help.
>
> Any ideas?
>
This is from the help:
"""
Help on function set_data in module matplotlib.lines:
set_data(self, *args)
Set the x and y data.
Parameters
----------
*args : (2, N) array or two 1D arrays
See Also
--------
set_xdata
set_ydata
"""
So, the arguments should be arrays:
For example:
x0, y0 = np.array([0.0]), np.array([0.0])
Has the API changed at some point?