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Doc: Markers update
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‎examples/lines_bars_and_markers/marker_fillstyle_reference.py‎

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=====================
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Reference for marker fill-styles included with Matplotlib.
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Also refer to the
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:doc:`/gallery/lines_bars_and_markers/marker_fillstyle_reference`
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and :doc:`/gallery/shapes_and_collections/marker_path` examples.
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"""
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import numpy as np
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import matplotlib.pyplot as plt

‎examples/lines_bars_and_markers/marker_reference.py‎

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"""
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================================
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Filled and unfilled-marker types
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================================
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================
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Marker Reference
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================
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Reference for filled- and unfilled-marker types included with Matplotlib.
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Reference for filled-, unfilled- and custom marker types with Matplotlib.
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For a list of all markers see the `matplotlib.markers` documentation. Also
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refer to the :doc:`/gallery/lines_bars_and_markers/marker_fillstyle_reference`
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and :doc:`/gallery/shapes_and_collections/marker_path` examples.
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"""
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import numpy as np
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points = np.ones(3) # Draw 3 points for each line
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text_style = dict(horizontalalignment='right', verticalalignment='center',
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fontsize=12, fontdict={'family': 'monospace'})
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marker_style = dict(linestyle=':', color='cornflowerblue', markersize=10)
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marker_style = dict(linestyle=':', color='0.8', markersize=10,
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mfc="C0", mec="C0")
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def format_axes(ax):
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ax.margins(0.2)
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ax.set_axis_off()
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ax.invert_yaxis()
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def nice_repr(text):
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return repr(text).lstrip('u')
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def math_repr(text):
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tx = repr(text).lstrip('u').strip("'").strip("$")
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return "'\${}\$'".format(tx)
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def split_list(a_list):
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i_half = len(a_list) // 2
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return (a_list[:i_half], a_list[i_half:])
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###############################################################################
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# Filled and unfilled-marker types
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# ================================
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#
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#
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# Plot all un-filled markers
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fig, axes = plt.subplots(ncols=2)
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fig.suptitle('un-filled markers', fontsize=14)
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# Filter out filled markers and marker settings that do nothing.
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unfilled_markers = [m for m, func in Line2D.markers.items()
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if func != 'nothing' and m not in Line2D.filled_markers]
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# Reverse-sort for pretty. We use our own sort key which is essentially
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# a python3 compatible reimplementation of python2 sort.
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unfilled_markers = sorted(unfilled_markers,
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key=lambda x: (str(type(x)), str(x)))[::-1]
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for ax, markers in zip(axes, split_list(unfilled_markers)):
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for y, marker in enumerate(markers):
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ax.text(-0.5, y, repr(marker), **text_style)
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ax.text(-0.5, y, nice_repr(marker), **text_style)
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ax.plot(y * points, marker=marker, **marker_style)
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format_axes(ax)
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fig.suptitle('un-filled markers', fontsize=14)
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plt.show()
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###############################################################################
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fig, axes = plt.subplots(ncols=2)
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for ax, markers in zip(axes, split_list(Line2D.filled_markers)):
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for y, marker in enumerate(markers):
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ax.text(-0.5, y, repr(marker), **text_style)
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ax.text(-0.5, y, nice_repr(marker), **text_style)
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ax.plot(y * points, marker=marker, **marker_style)
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format_axes(ax)
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fig.suptitle('filled markers', fontsize=14)
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plt.show()
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###############################################################################
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# Custom Markers with MathText
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# ============================
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#
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#
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# Use :doc:`MathText </tutorials/text/mathtext>`, to use custom marker symbols,
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# like e.g. ``"$\u266B$"``. For an overview over the STIX font symbols refer to the
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# `STIX font table <http://www.stixfonts.org/allGlyphs.html>`_.
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# Also see the :doc:`/gallery/text_labels_and_annotations/stix_fonts_demo`.
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fig, ax = plt.subplots()
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fig.subplots_adjust(left=0.4)
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marker_style.update(mec="None", markersize=15)
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markers = ["$1$", r"$\frac{1}{2}$", "$f$", "$\u266B$",
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r"$\mathcircled{m}$"]
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for y, marker in enumerate(markers):
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ax.text(-0.5, y, math_repr(marker), **text_style)
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ax.plot(y * points, marker=marker, **marker_style)
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format_axes(ax)
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plt.show()

‎lib/matplotlib/markers.py‎

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``"None"``, ``" "`` or ``""`` nothing
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``'$...$'`` |m37| Render the string using mathtext.
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E.g ``"$f$"`` for marker showing the
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letter ``f``.
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letter ``f``.
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``verts`` A list of (x, y) pairs used for Path
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vertices. The center of the marker is
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located at (0,0) and the size is
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``(numsides, style, angle)`` The marker can also be a tuple
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``(numsides, style, angle)``, which
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will create a custom, regular symbol.
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``numsides``:
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the number of sides
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``style``:
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the style of the regular symbol:
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| | ``angle`` is ignored); |
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| | deprecated. |
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+---+-----------------------------+
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``angle``:
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the angle of rotation of the symbol
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============================== ====== =========================================
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referred to from other docs for the valid inputs from marker inputs and in
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those cases ``None`` still means 'default'.
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Note that special symbols can be defined via the
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Note that special symbols can be defined via the
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:doc:`STIX math font </tutorials/text/mathtext>`,
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e.g. ``"$\u266B$"``. For an overview over the STIX font symbols refer to the
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`STIX font table <http://www.stixfonts.org/allGlyphs.html>`_.
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Also see the :doc:`/gallery/text_labels_and_annotations/stix_fonts_demo`.
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Integer numbers from ``0`` to ``11`` create lines and triangles. Those are
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equally accessible via capitalied variables, like ``CARETDOWNBASE``.
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equally accessible via capitalized variables, like ``CARETDOWNBASE``.
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Hence the following are equivalent::
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plt.plot([1,2,3], marker=11)
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plt.plot([1,2,3], marker=marker=matplotlib.markers.CARETDOWNBASE)
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plt.plot([1,2,3], marker=matplotlib.markers.CARETDOWNBASE)
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Examples showing the use of markers:
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* :doc:`/gallery/lines_bars_and_markers/marker_reference`
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* :doc:`/gallery/lines_bars_and_markers/marker_fillstyle_reference`
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* :doc:`/gallery/shapes_and_collections/marker_path`
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.. |m00| image:: /_static/markers/m00.png
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.. |m01| image:: /_static/markers/m01.png

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