Matplotlib - Library

Matplotlib is an open source library created in 2003 by John D. Hunter.

Source code:

git clone https://github.com/matplotlib/matplotlib

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matplotlib is a plotting library for the Python programming language and its numerical mathematics extension NumPy. It provides an object-oriented API for embedding plots into applications using general-purpose GUI toolkits like Tkinter, wxPython, Qt, or GTK+. There is also a procedural "pylab" interface based on a state machine (like OpenGL), designed to closely resemble that of MATLAB, though its use is discouraged. Read more on Wikipedia...

Matplotlib website
Matplotlib Wikipedia page
Matplotlib is developed on GitHub and has 15,728 stars
Matplotlib first developed in https://github.com/matplotlib
Matplotlib on Twitter
See also: (13 related languages)Python, NumPy, Qt, OpenGL, MATLAB, SciPy, Gnuplot, Julia, GNU Octave, Maxima, Microsoft Excel, Jython, Sage

Example from Wikipedia:

>>> from matplotlib import cm
>>> from mpl_toolkits.mplot3d import Axes3D
>>> import matplotlib.pyplot as plt
>>> import numpy as np
>>> fig = plt.figure()
>>> ax = fig.gca(projection='3d')
>>> X = np.arange(-5, 5, 0.25)
>>> Y = np.arange(-5, 5, 0.25)
>>> X, Y = np.meshgrid(X, Y)
>>> R = np.sqrt(X**2 + Y**2)
>>> Z = np.sin(R)
>>> surf = ax.plot_surface(X, Y, Z, rstride=1, cstride=1, cmap=cm.coolwarm)
>>> plt.show()