Mailman 3 April 2021 - Matplotlib-users

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by Carlos Baumann April 26, 2021

April 26, 2021

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libfreetype issues on Mac OSX Big Sur
by Samuel Dupree April 26, 2021

April 26, 2021

I'm running Matplotlib ver. 3.3.4 under the Anaconda distribution for Python 3.8.5 on a Mac OS X ver. 11.2. I am getting the following error: Traceback (most recent call last): File "temp.py", line 9, in <module> import matplotlib.pyplot as plt File "/Users/user/opt/anaconda3/lib/python3.8/site-packages/matplotlib/__init__.py", line 174, in <module> _check_versions() File "/Users/user/opt/anaconda3/lib/python3.8/site-packages/matplotlib/__init__.py", line 159, in _check_versions from . import ft2font ImportError: dlopen(/Users/user/opt/anaconda3/lib/python3.8/site-packages/matplotlib/ft2font.cpython-38-darwin.so, 2): Library not loaded: @rpath/libfreetype.6.dylib Referenced from: /Users/user/opt/anaconda3/lib/python3.8/site-packages/matplotlib/ft2font.cpython-38-darwin.so Reason: Incompatible library version: ft2font.cpython-38-darwin.so requires version 24.0.0 or later, but libfreetype.6.dylib provides version 23.0.0 (base) user@Mac-Pro ~ % The python script being used is #!/Users/user/opt/anaconda3/bin/python """ Spyder Editor This is a temporary script file. """ import matplotlib.pyplot as plt import numpy as np plt.style.use("ggplot") t = np.arange(0.0, 2.0, 0.1) s = np.sin(2 * np.pi * t) s2 = np.cos(2 * np.pi * t) plt.plot(t, s, "o-", lw=4.1) plt.plot(t, s2, "o-", lw=4.1) plt.xlabel("time (s)") plt.ylabel("Voltage (mV)") plt.title("Simple plot $\\frac{\\alpha}{2}$") plt.grid(True) plt.savefig("test.png") plt.show() Any ideas? Sam Dupree.

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Ingenuity First Flight
by Pierre Haessig April 26, 2021

April 26, 2021

Hi, Although in 2021 the widespread usage of Python in science is not so much of a surprise, I find it still nice to spot Matplotlib plotting windows. Here at 0'34", the altimeter data of NASA’s Ingenuity Mars Helicopter first flight: https://www.youtube.com/watch?v=ia6S1jZmwWc, plotted with C0/tab:blue color. Does someone knows the "SCLK" time unit ? Best, Pierre

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Student want to contribute!
by Dimitris Mazarakis April 25, 2021

April 25, 2021

Hello I am a student at the Department of Management Science & Technology and in the course "Software Engineering in Practice" I have to contribute to an open source project. I was thinking of the project matplotlib beacause I have used it in the past and it is a very useful tool and I also know python language from other courses and projects. It will be very helpful if you gave me an opinion whether I should or not choose your project to contribute. Thank very much for your time!

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sharex
by Gilles Allard April 15, 2021

April 15, 2021

The web documentation for matplotlib.axes.Axes.sharex state that Axes.sharex(ax) "is equivalent to passing sharex=ax when constructing the axes" I found it's not really true, at least in interactive mode. When we use add_axes(..., sharex=...), the Axis is shared and the xlims and ticks are also shared. If we use Axes.sharex=ax the xlims and xticks are not shared. Maybe there's a purpose for the discrepancy, but I can't understand it. Comments please! PS: tested with mpl3.3.4 and python3.8

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ANN: mplcairo 0.4 release
by Antony Lee April 2, 2021

April 2, 2021

Dear all, I am pleased to announce the release of mplcairo 0.4. mplcairo is a Matplotlib backend based on the well-known cairo library, supporting output to both raster (including interactively) and vector formats. In other words, it provides the functionality of Matplotlib's {,qt5,gtk3,wx,tk,macos}{agg,cairo}, pdf, ps, and svg backends. Per Matplotlib's standard API, the backend can be selected by calling matplotlib.use("module://mplcairo.qt") or setting your MPLBACKEND environment variable to `module://mplcairo.qt` for Qt5, and similarly for other toolkits. mplcairo 0.4 adds support for Matplotlib 3.4, support for retrieving underlying cairo contexts, as well as the usual bugfixes over 0.3. Enjoy, Antony Lee

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