.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/lines_bars_and_markers/errorbar_subsample.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. meta::
        :keywords: codex

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_gallery_lines_bars_and_markers_errorbar_subsample.py>`
        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.

.. GENERATED FROM PYTHON SOURCE LINES 10-41



.. image-sg:: /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
   :srcset: /gallery/lines_bars_and_markers/images/sphx_glr_errorbar_subsample_001.png, /gallery/lines_bars_and_markers/images/sphx_glr_errorbar_subsample_001_2_00x.png 2.00x
   :class: sphx-glr-single-img





.. code-block:: Python


    import matplotlib.pyplot as plt
    import numpy as np

    # 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 sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: errorbar_subsample.ipynb <errorbar_subsample.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: errorbar_subsample.py <errorbar_subsample.py>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_