.. only:: html
.. note::
:class: sphx-glr-download-link-note
Click :ref:`here ` to download the full example code
.. rst-class:: sphx-glr-example-title
.. _sphx_glr_gallery_recipes_centered_spines_with_arrows.py:
===========================
Centered spines with arrows
===========================
This example shows a way to draw a "math textbook" style plot, where the
spines ("axes lines") are drawn at ``x = 0`` and ``y = 0``, and have arrows at
their ends.
.. image:: /gallery/recipes/images/sphx_glr_centered_spines_with_arrows_001.png
:alt: centered spines with arrows
:class: sphx-glr-single-img
.. code-block:: default
import matplotlib.pyplot as plt
import numpy as np
fig, ax = plt.subplots()
# Move the left and bottom spines to x = 0 and y = 0, respectively.
ax.spines["left"].set_position(("data", 0))
ax.spines["bottom"].set_position(("data", 0))
# Hide the top and right spines.
ax.spines["top"].set_visible(False)
ax.spines["right"].set_visible(False)
# Draw arrows (as black triangles: ">k"/"^k") at the end of the axes. In each
# case, one of the coordinates (0) is a data coordinate (i.e., y = 0 or x = 0,
# respectively) and the other one (1) is an axes coordinate (i.e., at the very
# right/top of the axes). Also, disable clipping (clip_on=False) as the marker
# actually spills out of the axes.
ax.plot(1, 0, ">k", transform=ax.get_yaxis_transform(), clip_on=False)
ax.plot(0, 1, "^k", transform=ax.get_xaxis_transform(), clip_on=False)
# Some sample data.
x = np.linspace(-0.5, 1., 100)
ax.plot(x, np.sin(x*np.pi))
plt.show()
.. _sphx_glr_download_gallery_recipes_centered_spines_with_arrows.py:
.. only :: html
.. container:: sphx-glr-footer
:class: sphx-glr-footer-example
.. container:: sphx-glr-download sphx-glr-download-python
:download:`Download Python source code: centered_spines_with_arrows.py `
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: centered_spines_with_arrows.ipynb `
.. only:: html
.. rst-class:: sphx-glr-signature
Keywords: matplotlib code example, codex, python plot, pyplot
`Gallery generated by Sphinx-Gallery
`_