.. 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_lines_bars_and_markers_errorbar_subsample.py:
====================
Errorbar subsampling
====================
The parameter *errorevery* of `.Axes.errorbar` can be used to draw error bars
only on a subset of data points. This is particularly useful if there are many
data points with similar errors.
.. image:: /gallery/lines_bars_and_markers/images/sphx_glr_errorbar_subsample_001.png
:alt: Errorbar subsampling, all errorbars, only every 6th errorbar, second series shifted by 3
:class: sphx-glr-single-img
.. code-block:: default
import numpy as np
import matplotlib.pyplot as plt
# example data
x = np.arange(0.1, 4, 0.1)
y1 = np.exp(-1.0 * x)
y2 = np.exp(-0.5 * x)
# example variable error bar values
y1err = 0.1 + 0.1 * np.sqrt(x)
y2err = 0.1 + 0.1 * np.sqrt(x/2)
fig, (ax0, ax1, ax2) = plt.subplots(nrows=1, ncols=3, sharex=True,
figsize=(12, 6))
ax0.set_title('all errorbars')
ax0.errorbar(x, y1, yerr=y1err)
ax0.errorbar(x, y2, yerr=y2err)
ax1.set_title('only every 6th errorbar')
ax1.errorbar(x, y1, yerr=y1err, errorevery=6)
ax1.errorbar(x, y2, yerr=y2err, errorevery=6)
ax2.set_title('second series shifted by 3')
ax2.errorbar(x, y1, yerr=y1err, errorevery=(0, 6))
ax2.errorbar(x, y2, yerr=y2err, errorevery=(3, 6))
fig.suptitle('Errorbar subsampling')
plt.show()
.. _sphx_glr_download_gallery_lines_bars_and_markers_errorbar_subsample.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: errorbar_subsample.py `
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: errorbar_subsample.ipynb `
.. only:: html
.. rst-class:: sphx-glr-signature
Keywords: matplotlib code example, codex, python plot, pyplot
`Gallery generated by Sphinx-Gallery
`_