Merge pull request matplotlib#19326 from Ptrskay3/doc-colormap-whitespace

DOC: Whitespace in Choosing Colormaps tutorial plots

Author: tacaswell

tutorials/colors/colormaps.py

@@ -199,30 +199,31 @@
 # First, we'll show the range of each colormap. Note that some seem
 # to change more "quickly" than others.
 
-nrows = max(len(cmap_list) for cmap_category, cmap_list in cmaps.items())
 gradient = np.linspace(0, 1, 256)
 gradient = np.vstack((gradient, gradient))
 
 
-def plot_color_gradients(cmap_category, cmap_list, nrows):
-    fig, axs = plt.subplots(nrows=nrows)
-    fig.subplots_adjust(top=0.95, bottom=0.01, left=0.2, right=0.99)
+def plot_color_gradients(cmap_category, cmap_list):
+    # Create figure and adjust figure height to number of colormaps
+    nrows = len(cmap_list)
+    figh = 0.35 + 0.15 + (nrows + (nrows - 1) * 0.1) * 0.22
+    fig, axs = plt.subplots(nrows=nrows + 1, figsize=(6.4, figh))
+    fig.subplots_adjust(top=1 - 0.35 / figh, bottom=0.15 / figh,
+                        left=0.2, right=0.99)
     axs[0].set_title(cmap_category + ' colormaps', fontsize=14)
 
     for ax, name in zip(axs, cmap_list):
         ax.imshow(gradient, aspect='auto', cmap=plt.get_cmap(name))
-        pos = list(ax.get_position().bounds)
-        x_text = pos[0] - 0.01
-        y_text = pos[1] + pos[3]/2.
-        fig.text(x_text, y_text, name, va='center', ha='right', fontsize=10)
+        ax.text(-0.01, 0.5, name, va='center', ha='right', fontsize=10,
+                transform=ax.transAxes)
 
     # Turn off *all* ticks & spines, not just the ones with colormaps.
     for ax in axs:
         ax.set_axis_off()
 
 
 for cmap_category, cmap_list in cmaps.items():
-    plot_color_gradients(cmap_category, cmap_list, nrows)
+    plot_color_gradients(cmap_category, cmap_list)
 
 plt.show()