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Merged
merged 1 commit into from
Mar 18, 2019
Merged

Update stem example #13687

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1 change: 1 addition & 0 deletions .flake8
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,7 @@ per-file-ignores =
examples/lines_bars_and_markers/scatter_piecharts.py: E402
examples/lines_bars_and_markers/scatter_with_legend.py: E402
examples/lines_bars_and_markers/span_regions.py: E402
examples/lines_bars_and_markers/stem_plot.py: E402
examples/lines_bars_and_markers/step_demo.py: E402
examples/misc/agg_buffer.py: E402
examples/misc/anchored_artists.py: E501
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40 changes: 29 additions & 11 deletions examples/lines_bars_and_markers/stem_plot.py
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Expand Up @@ -3,23 +3,41 @@
Stem Plot
=========

Stem plot plots vertical lines from baseline to the y-coordinate
Plotting cosine(x) w.r.t x, using '-.' as the pattern
for plotting vertical lines
`~.pyplot.stem` plots vertical lines from a baseline to the y-coordinate and
places a marker at the tip.
"""
import matplotlib.pyplot as plt
import numpy as np

# returns 10 evenly spaced samples from 0.1 to 2*PI
x = np.linspace(0.1, 2 * np.pi, 10)
x = np.linspace(0.1, 2 * np.pi, 41)
y = np.exp(np.sin(x))

markerline, stemlines, baseline = plt.stem(x, np.cos(x), '-.')
plt.stem(x, y)
plt.show()

# setting property of baseline with color red and linewidth 2
plt.setp(baseline, color='r', linewidth=2)
#############################################################################
#
# The position of the baseline can be adapted using *bottom*.
# The parameters *linefmt*, *markerfmt*, and *basefmt* control basic format
# properties of the plot. However, in contrast to `~.pyplot.plot` not all
# properties are configurable via keyword arguments. For more advanced
# control adapt the line objects returned by `~.pyplot`.

markerline, stemlines, baseline = plt.stem(x, y, linefmt='grey', markerfmt='D',
bottom=1.1)
markerline.set_markerfacecolor('none')
plt.show()

#############################
# This example makes use of:
# * :meth:`matplotlib.axes.Axes.stem`
#############################################################################
#
# ------------
#
# References
# """"""""""
#
# The use of the following functions, methods, classes and modules is shown
# in this example:

import matplotlib
matplotlib.pyplot.stem
matplotlib.axes.Axes.stem