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Commitbebd7f1

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kolibril13timhoffm
authored andcommitted
Example for axhline and axvline (#15914)
* Example for sigmoid function with horizontal lines* simplified script and changed title* fixed typo* Fixing heading markup and specifying purpose of plot* remove blank line* added per-file-ignores sigmoid_function.py : E402* Rename example file sigmoid_function.py to axline.py
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‎.flake8

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examples/pyplots/annotation_basic.py: E402
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examples/pyplots/annotation_polar.py: E231, E402
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examples/pyplots/auto_subplots_adjust.py: E231, E302, E402
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examples/pyplots/axline.py: E402
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examples/pyplots/boxplot_demo_pyplot.py: E231, E402
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examples/pyplots/compound_path_demo.py: E231
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examples/pyplots/dollar_ticks.py: E402

‎examples/pyplots/axline.py

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"""
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======================================
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Infinite horizontal and vertical lines
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======================================
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`~.axes.Axes.axvline` and `~.axes.Axes.axhline` draw infinite vertical /
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horizontal lines, at given *x* / *y* positions. They are usually used to mark
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special data values, e.g. in this example the center and limit values of the
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sigmoid function.
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"""
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importnumpyasnp
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importmatplotlib.pyplotasplt
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t=np.linspace(-10,10,100)
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sig=1/ (1+np.exp(-t))
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plt.axhline(y=0,color="black",linestyle="--")
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plt.axhline(y=0.5,color="black",linestyle=":")
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plt.axhline(y=1.0,color="black",linestyle="--")
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plt.axvline(color="grey")
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plt.plot(t,sig,linewidth=2,label=r"$\sigma(t) = \frac{1}{1 + e^{-t}}$")
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plt.xlim(-10,10)
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plt.xlabel("t")
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plt.legend(fontsize=14)
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plt.show()
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#############################################################################
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#
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# ------------
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#
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# References
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# """"""""""
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#
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# The use of the following functions, methods, classes and modules is shown
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# in this example:
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importmatplotlib
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matplotlib.pyplot.axhline
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matplotlib.pyplot.axvline
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matplotlib.axes.Axes.axhline
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matplotlib.axes.Axes.axvline

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