Tweak titles pyplot examples.

anntzer · anntzer · commit 236a6baa0123 · 2023-01-18T13:59:29.000+01:00
In particular, arrange to not capitalize pyplot.  The old titles were
not particularly great (and likely derived automatically from the
filename back when the move to s-g was done).

Also merge the pyplot_text and pyplot_mathtext examples (both examples
actually show both text and mathtext).
diff --git a/examples/pyplots/axline.py b/examples/pyplots/axline.py
@@ -10,6 +10,7 @@
 
 `~.axes.Axes.axline` draws infinite straight lines in arbitrary directions.
 """
+
 import numpy as np
 import matplotlib.pyplot as plt
 
diff --git a/examples/pyplots/pyplot_mathtext.py b/examples/pyplots/pyplot_mathtext.py
diff --git a/examples/pyplots/pyplot_simple.py b/examples/pyplots/pyplot_simple.py
@@ -1,16 +1,16 @@
 """
-=============
-Pyplot Simple
-=============
+===========
+Simple plot
+===========
 
-A very simple pyplot where a list of numbers are plotted against their
-index. Creates a straight line due to the rate of change being 1 for
-both the X and Y axis. Use a format string (here, 'o-r') to set the
+A simple plot where a list of numbers are plotted against their index,
+resulting in a straight line. Use a format string (here, 'o-r') to set the
 markers (circles), linestyle (solid line) and color (red).
 
 .. redirect-from:: /gallery/pyplots/fig_axes_labels_simple
 .. redirect-from:: /gallery/pyplots/pyplot_formatstr
 """
+
 import matplotlib.pyplot as plt
 
 plt.plot([1, 2, 3, 4], 'o-r')
diff --git a/examples/pyplots/pyplot_text.py b/examples/pyplots/pyplot_text.py
@@ -1,29 +1,22 @@
 """
-===========
-Pyplot Text
-===========
+=============================
+Text and mathtext with pyplot
+=============================
 
+.. redirect-from:: /gallery/pyplots/pyplot_mathtext
 """
+
 import numpy as np
 import matplotlib.pyplot as plt
 
-# Fixing random state for reproducibility
-np.random.seed(19680801)
-
-mu, sigma = 100, 15
-x = mu + sigma * np.random.randn(10000)
-
-# the histogram of the data
-n, bins, patches = plt.hist(x, 50, density=True, facecolor='g', alpha=0.75)
-
+t = np.arange(0.0, 2.0, 0.01)
+s = np.sin(2*np.pi*t)
 
-plt.xlabel('Smarts')
-plt.ylabel('Probability')
-plt.title('Histogram of IQ')
-plt.text(60, .025, r'$\mu=100,\ \sigma=15$')
-plt.xlim(40, 160)
-plt.ylim(0, 0.03)
-plt.grid(True)
+plt.plot(t, s)
+plt.text(0, -1, r'Hello, world!', fontsize=15)
+plt.title(r'$\mathcal{A}\sin(\omega t)$', fontsize=20)
+plt.xlabel('Time [s]')
+plt.ylabel('Voltage [mV]')
 plt.show()
 
 #############################################################################
diff --git a/examples/pyplots/pyplot_three.py b/examples/pyplots/pyplot_three.py
@@ -1,10 +1,11 @@
 """
-============
-Pyplot Three
-============
+=======================
+Three lines with pyplot
+=======================
 
-Plot three line plots in a single call to `~matplotlib.pyplot.plot`.
+Make three line plots with a single call to `~matplotlib.pyplot.plot`.
 """
+
 import numpy as np
 import matplotlib.pyplot as plt
 
diff --git a/examples/pyplots/pyplot_two_subplots.py b/examples/pyplots/pyplot_two_subplots.py
@@ -1,10 +1,11 @@
 """
-===================
-Pyplot Two Subplots
-===================
+========================
+Two subplots with pyplot
+========================
 
 Create a figure with two subplots with `.pyplot.subplot`.
 """
+
 import numpy as np
 import matplotlib.pyplot as plt
 
