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

.. only:: html

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

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

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

.. _sphx_glr_examples_plotting_plot_rhi_data_overlay.py:


====================================================================
Create an RHI plot with reflectivity contour lines from an MDV file
====================================================================

An example which creates an RHI plot of velocity using a RadarDisplay object
and adding Reflectivity contours from the same MDV file.

.. GENERATED FROM PYTHON SOURCE LINES 10-96



.. image-sg:: /examples/plotting/images/sphx_glr_plot_rhi_data_overlay_001.png
   :alt: CP2, Redbank Plains, Piraq IQ data. 242.0 Deg. 2014-12-11T03:41:28Z  Radial velocity of scatterers away from instrument
   :srcset: /examples/plotting/images/sphx_glr_plot_rhi_data_overlay_001.png
   :class: sphx-glr-single-img





.. code-block:: Python

    print(__doc__)

    # Author: Cory Weber (cweber@anl.gov)
    # License: BSD 3 clause
    import matplotlib.pyplot as plt
    import numpy as np
    import scipy.ndimage as spyi

    import pyart
    from pyart.testing import get_test_data

    filename = get_test_data("034142.mdv")

    # create the plot using RadarDisplay
    sweep = 2
    # read file
    radar = pyart.io.read_mdv(filename)
    display = pyart.graph.RadarDisplay(radar)
    fig = plt.figure(figsize=[20, 5])
    ax = fig.add_subplot(111)

    # plot velocity
    # cmap is the color ramp being used in this case blue to red no 18
    # https://github.com/ARM-DOE/pyart/blob/master/pyart/graph/cm.py
    # for more information

    display.plot(
        "velocity",
        sweep=sweep,
        vmin=-20,
        vmax=20.0,
        fig=fig,
        ax=ax,
        cmap="pyart_BuDRd18",
        colorbar_label="Velocity (m/s)",
    )

    # line commented out to show reflectivity
    # display.plot('reflectivity', sweep=sweep, vmin=-0, vmax=45.0, fig=fig,ax=ax)

    # get data
    start = radar.get_start(sweep)
    end = radar.get_end(sweep) + 1
    data = radar.get_field(sweep, "reflectivity")
    x, y, z = radar.get_gate_x_y_z(sweep, edges=False)

    x /= 1000.0
    y /= 1000.0
    z /= 1000.0

    # smooth out the lines
    data = spyi.gaussian_filter(data, sigma=1.2)

    # calculate (R)ange
    R = np.sqrt(x**2 + y**2) * np.sign(y)
    R = -R
    display.set_limits(xlim=[25, 0], ylim=[0, 5])

    # add contours
    # creates steps 35 to 100 by 5
    levels = np.arange(35, 100, 5)
    # adds coutours to plot
    contours = ax.contour(
        R, z, data, levels, linewidths=1.5, colors="k", linestyles="solid", antialiased=True
    )

    # adds contour labels (fmt= '%r' displays 10.0 vs 10.0000)
    plt.clabel(contours, levels, fmt="%r", inline=True, fontsize=10)


    # format plot
    # add grid (dotted lines, major axis only)
    ax.grid(color="k", linestyle=":", linewidth=1, which="major")

    # horizontal
    ax.axhline(0.9, 0, 1, linestyle="solid", color="k", linewidth=2)
    ax.axhline(1.3, 0, 1, linestyle="dashed", color="k", linewidth=2)

    # vertical
    ax.axvline(15, 0, 1, linestyle="solid", color="#00b4ff", linewidth=2)
    ax.axvline(4.5, 0, 1, linestyle="solid", color="#ff6800", linewidth=2)

    # setting matplotlib overrides display.plot defaults
    ax.set_ylabel("Altitude above CP-2 (km)")

    plt.show()


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

   **Total running time of the script:** (0 minutes 1.114 seconds)


.. _sphx_glr_download_examples_plotting_plot_rhi_data_overlay.py:

.. only:: html

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

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

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

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

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


.. only:: html

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

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