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Fix cohere-demo #7968

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Merged
dopplershift merged 5 commits into from
Feb 8, 2017
Merged

Fix cohere-demo #7968

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9f5c27f
Fix cohere-demo
dstansby Jan 28, 2017
a54d257
Add exaple title to cohere_demo
dstansby Jan 29, 2017
7f81351
Move cohere_demo to lines_bars_and_markers
dstansby Jan 29, 2017
998af8b
Add in missing .py
dstansby Jan 29, 2017
f406d7d
Remove convolution from cohere_demo
dstansby Feb 7, 2017
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34 changes: 34 additions & 0 deletions examples/lines_bars_and_markers/cohere_demo.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,34 @@
"""
=====================================
Plotting the coherence of two signals
=====================================

An example showing how to plot the coherence of two signals.
"""
import numpy as np
import matplotlib.pyplot as plt

# Fixing random state for reproducibility
np.random.seed(19680801)

dt = 0.01
t = np.arange(0, 30, dt)
nse1 = np.random.randn(len(t)) # white noise 1
nse2 = np.random.randn(len(t)) # white noise 2

# Two signals with a coherent part at 10Hz and a random part
s1 = np.sin(2 * np.pi * 10 * t) + nse1
s2 = np.sin(2 * np.pi * 10 * t) + nse2

fig, axs = plt.subplots(2, 1)
axs[0].plot(t, s1, t, s2)
axs[0].set_xlim(0, 2)
axs[0].set_xlabel('time')
axs[0].set_ylabel('s1 and s2')
axs[0].grid(True)

cxy, f = axs[1].cohere(s1, s2, 256, 1. / dt)
axs[1].set_ylabel('coherence')

fig.tight_layout()
plt.show()
37 changes: 0 additions & 37 deletions examples/pylab_examples/cohere_demo.py
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2 changes: 1 addition & 1 deletion examples/tests/backend_driver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,7 @@

files['lines'] = [
'barh_demo.py',
'cohere_demo.py',
'fill_demo.py',
'fill_demo_features.py',
'line_demo_dash_control.py',
Expand Down Expand Up @@ -127,7 +128,6 @@
'barcode_demo.py',
'boxplot_demo.py',
'broken_barh.py',
'cohere_demo.py',
'color_by_yvalue.py',
'color_demo.py',
'colorbar_tick_labelling_demo.py',
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2 changes: 1 addition & 1 deletion lib/matplotlib/axes/_axes.py
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Expand Up @@ -7082,7 +7082,7 @@ def cohere(self, x, y, NFFT=256, Fs=2, Fc=0, detrend=mlab.detrend_none,

Examples
--------
.. plot:: mpl_examples/pylab_examples/cohere_demo.py
.. plot:: mpl_examples/lines_bars_and_markers/cohere_demo.py
"""
if not self._hold:
self.cla()
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