.. only:: html

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

        Click :ref:`here <sphx_glr_download_gallery_lines_bars_and_markers_scatter_demo2.py>`     to download the full example code
    .. rst-class:: sphx-glr-example-title

    .. _sphx_glr_gallery_lines_bars_and_markers_scatter_demo2.py:


=============
Scatter Demo2
=============

Demo of scatter plot with varying marker colors and sizes.



.. image:: /gallery/lines_bars_and_markers/images/sphx_glr_scatter_demo2_001.png
    :alt: Volume and percent change
    :class: sphx-glr-single-img






.. code-block:: default

    import numpy as np
    import matplotlib.pyplot as plt
    import matplotlib.cbook as cbook

    # Load a numpy record array from yahoo csv data with fields date, open, close,
    # volume, adj_close from the mpl-data/example directory. The record array
    # stores the date as an np.datetime64 with a day unit ('D') in the date column.
    price_data = (cbook.get_sample_data('goog.npz', np_load=True)['price_data']
                  .view(np.recarray))
    price_data = price_data[-250:]  # get the most recent 250 trading days

    delta1 = np.diff(price_data.adj_close) / price_data.adj_close[:-1]

    # Marker size in units of points^2
    volume = (15 * price_data.volume[:-2] / price_data.volume[0])**2
    close = 0.003 * price_data.close[:-2] / 0.003 * price_data.open[:-2]

    fig, ax = plt.subplots()
    ax.scatter(delta1[:-1], delta1[1:], c=close, s=volume, alpha=0.5)

    ax.set_xlabel(r'$\Delta_i$', fontsize=15)
    ax.set_ylabel(r'$\Delta_{i+1}$', fontsize=15)
    ax.set_title('Volume and percent change')

    ax.grid(True)
    fig.tight_layout()

    plt.show()


.. _sphx_glr_download_gallery_lines_bars_and_markers_scatter_demo2.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: scatter_demo2.py <scatter_demo2.py>`



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

     :download:`Download Jupyter notebook: scatter_demo2.ipynb <scatter_demo2.ipynb>`


.. only:: html

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

    Keywords: matplotlib code example, codex, python plot, pyplot
    `Gallery generated by Sphinx-Gallery
    <https://sphinx-gallery.readthedocs.io>`_