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

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_examples_plots_Hodograph_Inset.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_examples_plots_Hodograph_Inset.py:


===============
Hodograph Inset
===============

Layout a Skew-T plot with a hodograph inset into the plot.

.. GENERATED FROM PYTHON SOURCE LINES 11-21

.. code-block:: Python


    import matplotlib.pyplot as plt
    from mpl_toolkits.axes_grid1.inset_locator import inset_axes
    import pandas as pd

    import metpy.calc as mpcalc
    from metpy.cbook import get_test_data
    from metpy.plots import add_metpy_logo, Hodograph, SkewT
    from metpy.units import units








.. GENERATED FROM PYTHON SOURCE LINES 22-24

Upper air data can be obtained using the siphon package, but for this example we will use
some of MetPy's sample data.

.. GENERATED FROM PYTHON SOURCE LINES 24-34

.. code-block:: Python


    col_names = ['pressure', 'height', 'temperature', 'dewpoint', 'direction', 'speed']

    df = pd.read_fwf(get_test_data('may4_sounding.txt', as_file_obj=False),
                     skiprows=5, usecols=[0, 1, 2, 3, 6, 7], names=col_names)

    # Drop any rows with all NaN values for T, Td, winds
    df = df.dropna(subset=('temperature', 'dewpoint', 'direction', 'speed'
                           ), how='all').reset_index(drop=True)








.. GENERATED FROM PYTHON SOURCE LINES 35-37

We will pull the data out of the example dataset into individual variables and
assign units.

.. GENERATED FROM PYTHON SOURCE LINES 37-46

.. code-block:: Python


    hght = df['height'].values * units.hPa
    p = df['pressure'].values * units.hPa
    T = df['temperature'].values * units.degC
    Td = df['dewpoint'].values * units.degC
    wind_speed = df['speed'].values * units.knots
    wind_dir = df['direction'].values * units.degrees
    u, v = mpcalc.wind_components(wind_speed, wind_dir)








.. GENERATED FROM PYTHON SOURCE LINES 47-78

.. code-block:: Python


    # Create a new figure. The dimensions here give a good aspect ratio
    fig = plt.figure(figsize=(9, 9))
    add_metpy_logo(fig, 115, 100)

    # Grid for plots
    skew = SkewT(fig, rotation=45)

    # Plot the data using normal plotting functions, in this case using
    # log scaling in Y, as dictated by the typical meteorological plot
    skew.plot(p, T, 'r')
    skew.plot(p, Td, 'g')
    skew.plot_barbs(p, u, v)
    skew.ax.set_ylim(1000, 100)

    # Add the relevant special lines
    skew.plot_dry_adiabats()
    skew.plot_moist_adiabats()
    skew.plot_mixing_lines()

    # Good bounds for aspect ratio
    skew.ax.set_xlim(-50, 60)

    # Create a hodograph
    ax_hod = inset_axes(skew.ax, '40%', '40%', loc=1)
    h = Hodograph(ax_hod, component_range=80.)
    h.add_grid(increment=20)
    h.plot_colormapped(u, v, hght)

    # Show the plot
    plt.show()



.. image-sg:: /examples/plots/images/sphx_glr_Hodograph_Inset_001.png
   :alt: Hodograph Inset
   :srcset: /examples/plots/images/sphx_glr_Hodograph_Inset_001.png
   :class: sphx-glr-single-img






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

   **Total running time of the script:** (0 minutes 0.263 seconds)


.. _sphx_glr_download_examples_plots_Hodograph_Inset.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

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

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

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

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


.. only:: html

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

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