.. _lines_bars_and_markers-marker_reference:

lines_bars_and_markers example code: marker_reference.py
========================================================



.. plot:: /home/tcaswell/source/my_source/matplotlib/doc/mpl_examples/lines_bars_and_markers/marker_reference.py

::

    """
    Reference for filled- and unfilled-marker types included with Matplotlib.
    """
    from six import iteritems
    import numpy as np
    import matplotlib.pyplot as plt
    from matplotlib.lines import Line2D
    
    
    points = np.ones(3)  # Draw 3 points for each line
    text_style = dict(horizontalalignment='right', verticalalignment='center',
                      fontsize=12, fontdict={'family': 'monospace'})
    marker_style = dict(linestyle=':', color='cornflowerblue', markersize=10)
    
    
    def format_axes(ax):
        ax.margins(0.2)
        ax.set_axis_off()
    
    
    def nice_repr(text):
        return repr(text).lstrip('u')
    
    
    def split_list(a_list):
        i_half = len(a_list) // 2
        return (a_list[:i_half], a_list[i_half:])
    
    
    # Plot all un-filled markers
    # --------------------------
    
    fig, axes = plt.subplots(ncols=2)
    
    # Filter out filled markers and marker settings that do nothing.
    # We use iteritems from six to make sure that we get an iterator
    # in both python 2 and 3
    unfilled_markers = [m for m, func in iteritems(Line2D.markers)
                        if func != 'nothing' and m not in Line2D.filled_markers]
    # Reverse-sort for pretty. We use our own sort key which is essentially
    # a python3 compatible reimplementation of python2 sort.
    unfilled_markers = sorted(unfilled_markers,
                              key=lambda x: (str(type(x)), str(x)))[::-1]
    for ax, markers in zip(axes, split_list(unfilled_markers)):
        for y, marker in enumerate(markers):
            ax.text(-0.5, y, nice_repr(marker), **text_style)
            ax.plot(y * points, marker=marker, **marker_style)
            format_axes(ax)
    fig.suptitle('un-filled markers', fontsize=14)
    
    
    # Plot all filled markers.
    # ------------------------
    
    fig, axes = plt.subplots(ncols=2)
    for ax, markers in zip(axes, split_list(Line2D.filled_markers)):
        for y, marker in enumerate(markers):
            ax.text(-0.5, y, nice_repr(marker), **text_style)
            ax.plot(y * points, marker=marker, **marker_style)
            format_axes(ax)
    fig.suptitle('filled markers', fontsize=14)
    
    plt.show()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)