Convert mathtext examples to OO API.

Author: QuLogic

examples/text_labels_and_annotations/mathtext_examples.py

@@ -62,40 +62,41 @@ def doall():
     mpl_grey_rvb = (51. / 255., 51. / 255., 51. / 255.)
 
     # Creating figure and axis.
-    plt.figure(figsize=(6, 7))
-    plt.axes([0.01, 0.01, 0.98, 0.90], facecolor="white", frameon=True)
-    plt.gca().set_xlim(0., 1.)
-    plt.gca().set_ylim(0., 1.)
-    plt.gca().set_title("Matplotlib's math rendering engine",
-                        color=mpl_grey_rvb, fontsize=14, weight='bold')
-    plt.gca().set_xticklabels([])
-    plt.gca().set_yticklabels([])
+    fig = plt.figure(figsize=(6, 7))
+    ax = fig.add_axes([0.01, 0.01, 0.98, 0.90],
+                      facecolor="white", frameon=True)
+    ax.set_xlim(0, 1)
+    ax.set_ylim(0, 1)
+    ax.set_title("Matplotlib's math rendering engine",
+                 color=mpl_grey_rvb, fontsize=14, weight='bold')
+    ax.set_xticklabels([])
+    ax.set_yticklabels([])
 
     # Gap between lines in axes coords
     line_axesfrac = 1 / n_lines
 
     # Plotting header demonstration formula
     full_demo = mathext_demos[0]
-    plt.annotate(full_demo,
-                 xy=(0.5, 1. - 0.59 * line_axesfrac),
-                 color=mpl_orange_rvb, ha='center', fontsize=20)
+    ax.annotate(full_demo,
+                xy=(0.5, 1. - 0.59 * line_axesfrac),
+                color=mpl_orange_rvb, ha='center', fontsize=20)
 
     # Plotting features demonstration formulae
     for i_line in range(1, n_lines):
         baseline = 1 - i_line * line_axesfrac
         baseline_next = baseline - line_axesfrac
         title = mathtext_titles[i_line] + ":"
         fill_color = ['white', mpl_blue_rvb][i_line % 2]
-        plt.fill_between([0., 1.], [baseline, baseline],
-                         [baseline_next, baseline_next],
-                         color=fill_color, alpha=0.5)
-        plt.annotate(title,
-                     xy=(0.07, baseline - 0.3 * line_axesfrac),
-                     color=mpl_grey_rvb, weight='bold')
+        ax.fill_between([0, 1], [baseline, baseline],
+                        [baseline_next, baseline_next],
+                        color=fill_color, alpha=0.5)
+        ax.annotate(title,
+                    xy=(0.07, baseline - 0.3 * line_axesfrac),
+                    color=mpl_grey_rvb, weight='bold')
         demo = mathext_demos[i_line]
-        plt.annotate(demo,
-                     xy=(0.05, baseline - 0.75 * line_axesfrac),
-                     color=mpl_grey_rvb, fontsize=16)
+        ax.annotate(demo,
+                    xy=(0.05, baseline - 0.75 * line_axesfrac),
+                    color=mpl_grey_rvb, fontsize=16)
 
     for i in range(n_lines):
         s = mathext_demos[i]

examples/text_labels_and_annotations/mathtext_fontfamily_example.py

@@ -13,25 +13,26 @@
 
 import matplotlib.pyplot as plt
 
-plt.figure(figsize=(6, 5))
+
+fig, ax = plt.subplots(figsize=(6, 5))
 
 # A simple plot for the background.
-plt.plot(range(11), color="0.9")
+ax.plot(range(11), color="0.9")
 
 # A text mixing normal text and math text.
 msg = (r"Normal Text. $Text\ in\ math\ mode:\ "
        r"\int_{0}^{\infty } x^2 dx$")
 
 # Set the text in the plot.
-plt.text(1, 7, msg, size=12, math_fontfamily='cm')
+ax.text(1, 7, msg, size=12, math_fontfamily='cm')
 
 # Set another font for the next text.
-plt.text(1, 3, msg, size=12, math_fontfamily='dejavuserif')
+ax.text(1, 3, msg, size=12, math_fontfamily='dejavuserif')
 
 # *math_fontfamily* can be used in most places where there is text,
 # like in the title:
-plt.title(r"$Title\ in\ math\ mode:\ \int_{0}^{\infty } x^2 dx$",
-          math_fontfamily='stixsans', size=14)
+ax.set_title(r"$Title\ in\ math\ mode:\ \int_{0}^{\infty } x^2 dx$",
+             math_fontfamily='stixsans', size=14)
 
 # Note that the normal text is not changed by *math_fontfamily*.
 plt.show()