.. only:: html

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

        Click :ref:`here <sphx_glr_download_auto_data_analysis_sample_analysis_plot_visualize_empirical_cdf.py>`     to download the full example code
    .. rst-class:: sphx-glr-example-title

    .. _sphx_glr_auto_data_analysis_sample_analysis_plot_visualize_empirical_cdf.py:


Draw the empirical CDF
======================

In this example we are going to draw the empirical CDF of an unidimensional sample.


.. code-block:: default

    from __future__ import print_function
    import openturns as ot
    import openturns.viewer as viewer
    from matplotlib import pylab as plt
    ot.Log.Show(ot.Log.NONE)








Then create a sample from a gaussian distribution.


.. code-block:: default

    size = 100
    normal = ot.Normal(1)
    sample = normal.getSample(size)








We draw the empirical CDF based on the `UserDefined` distribution. By default, the `drawCDF` method requires no input argument.


.. code-block:: default

    distribution = ot.UserDefined(sample)
    graph = distribution.drawCDF()
    view = viewer.View(graph)




.. image:: /auto_data_analysis/sample_analysis/images/sphx_glr_plot_visualize_empirical_cdf_001.png
    :alt: X0 CDF
    :class: sphx-glr-single-img





If required, we can specify the interval that we want to draw. In the following example, these bounds are computed from the minimum and the maximum of the sample.


.. code-block:: default

    xmin = sample.getMin()[0] - 2.0
    xmax = sample.getMax()[0] + 2.0
    graph = ot.UserDefined(sample).drawCDF(xmin, xmax)
    view = viewer.View(graph)
    plt.show()



.. image:: /auto_data_analysis/sample_analysis/images/sphx_glr_plot_visualize_empirical_cdf_002.png
    :alt: X0 CDF
    :class: sphx-glr-single-img






.. rst-class:: sphx-glr-timing

   **Total running time of the script:** ( 0 minutes  0.137 seconds)


.. _sphx_glr_download_auto_data_analysis_sample_analysis_plot_visualize_empirical_cdf.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: plot_visualize_empirical_cdf.py <plot_visualize_empirical_cdf.py>`



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

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


.. only:: html

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

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