Merge pull request #10 from matplotlib/nicolas

Nicolas

Author: rougier

cheatsheets-1.png

@@ -931,8 +931,24 @@
       K: lower center / (.5,1.1) & L: lower left / (.1,1.1)
     \end{tabular}  
   \end{myboxed}
+  %
+  \vspace{\fill}
+  %
+  \begin{myboxed}{Annotation connection styles \hfill
+      \API{https://matplotlib.org/tutorials/text/annotations.html} }
+    \includegraphics[width=\columnwidth]{annotation-connection-styles.pdf}
+  \end{myboxed}
+  %
+  \vspace{\fill}
+  %
+  \begin{myboxed}{Annotation arrow styles \hfill
+      \API{https://matplotlib.org/tutorials/text/annotations.html} }
+    \includegraphics[width=\columnwidth]{annotation-arrow-styles.pdf}
+  \end{myboxed}
 
-  \vfill\null \columnbreak
+  %
+  \vspace{\fill}
+  %
 
   %
   \begin{myboxed}{How do I …}
@@ -960,10 +976,14 @@
     \hspace*{2.5mm}~$\rightarrow$ ax.fill\_between(X, Y+error, Y-error)\\
     \textbf{… draw a rectangle?}\\
     \hspace*{2.5mm}~$\rightarrow$  ax.add\_patch(plt.Rectangle((0, 0),1,1)\\
+    \textbf{… draw a vertical line?}\\
+    \hspace*{2.5mm}~$\rightarrow$  ax.axvline(x=0.5)\\
     \textbf{… draw outside frame?}\\
     \hspace*{2.5mm}~$\rightarrow$  ax.plot(…, clip\_on=False)\\
     \textbf{… use transparency?}\\
     \hspace*{2.5mm}~$\rightarrow$  ax.plot(…, alpha=0.25)\\
+    \textbf{… convert an RGB image into a gray image? }\\
+    \hspace*{2.5mm}~$\rightarrow$  gray = 0.2989*R+0.5870*G+0.1140*B\\
     \textbf{… set figure background color?}\\
     \hspace*{2.5mm}~$\rightarrow$ fig.patch.set\_facecolor(``grey'')\\
     \textbf{… get a reversed colormap?}\\
@@ -979,14 +999,18 @@
   \begin{myboxed}{Performance tips}
     \smallskip
     {\ttfamily \fontsize{6pt}{7pt}\selectfont
+     %
     \textcolor{red}{scatter(X, Y)  \hfill slow}\\
-    plot(X, Y, marker="o", ls="")  \hfill fast\\
-    \hrule \smallskip
+    plot(X, Y, marker="o", ls="")  \hfill fast%
+    \vskip.5\baselineskip
+    %
     \textcolor{red}{for i in range(n): plot(X[i]) \hfill slow}\\
-    plot(sum([x+[None] for x in X],[])) \hfill fast\\
-    \hrule \smallskip
+    plot(sum([x+[None] for x in X],[])) \hfill fast%
+    \vskip.5\baselineskip
+    %
     \textcolor{red}{cla(), imshow(…), canvas.draw() \hfill slow}\\
-    im.set\_data(…), canvas.draw() \hfill fast\smallskip
+    im.set\_data(…), canvas.draw() \hfill fast%
+    \vskip.1\baselineskip
     }
   \end{myboxed}
   %

cheatsheets-2.png

@@ -0,0 +1,28 @@
+import matplotlib.pyplot as plt
+import matplotlib.patches as mpatches
+
+styles = mpatches.ArrowStyle.get_styles()
+def demo_con_style(ax, connectionstyle):
+    ax.text(.05, .95, connectionstyle.replace(",", ",\n"),
+            family="Source Code Pro",
+            transform=ax.transAxes, ha="left", va="top", size="x-small")
+
+fig, ax = plt.subplots(figsize=(4, 2.5), frameon=False)
+ax.axis("off")
+for i,style in enumerate(mpatches.ArrowStyle.get_styles()):
+    x0, y0 = 5 + 5*(i%3), -(i//3)
+    x1, y1 = 1 + 5*(i%3), -(i//3)
+    ax.plot([x0, x1], [y0, y1], ".", color="0.25")
+    ax.annotate("",
+                xy=(x0, y0), xycoords='data',
+                xytext=(x1, y1), textcoords='data',
+                arrowprops=dict(arrowstyle=style,
+                                color="black",
+                                shrinkA=5, shrinkB=5,
+                                patchA=None, patchB=None,
+                                connectionstyle="arc3,rad=0"))
+    ax.text( (x1+x0)/2, y0-0.2, style,
+             family = "Source Code Pro", ha="center", va="top")
+
+plt.savefig("../figures/annotation-arrow-styles.pdf")
+# plt.show()

cheatsheets.tex

@@ -0,0 +1,35 @@
+import matplotlib.pyplot as plt
+
+def demo_con_style(ax, connectionstyle):
+    x1, y1 = 0.3, 0.2
+    x2, y2 = 0.8, 0.6
+    ax.plot([x1, x2], [y1, y2], ".")
+    ax.annotate("",
+                xy=(x1, y1), xycoords='data',
+                xytext=(x2, y2), textcoords='data',
+                arrowprops=dict(arrowstyle="->", color="0.5",
+                                shrinkA=5, shrinkB=5,
+                                patchA=None, patchB=None,
+                                connectionstyle=connectionstyle),
+                )
+    ax.text(.05, .95, connectionstyle.replace(",", ",\n"),
+            family="Source Code Pro",
+            transform=ax.transAxes, ha="left", va="top", size="x-small")
+
+fig, axs = plt.subplots(3, 3, figsize=(5, 5))
+demo_con_style(axs[0, 0], "arc3,rad=0")
+demo_con_style(axs[0, 1], "arc3,rad=0.3")
+demo_con_style(axs[0, 2], "angle3,angleA=0,angleB=90")
+demo_con_style(axs[1, 0], "angle,angleA=-90,angleB=180,rad=0")
+demo_con_style(axs[1, 1], "angle,angleA=-90,angleB=180,rad=25")
+demo_con_style(axs[1, 2], "arc,angleA=-90,angleB=0,armA=0,armB=40,rad=0")
+demo_con_style(axs[2, 0], "bar,fraction=0.3")
+demo_con_style(axs[2, 1], "bar,fraction=-0.3")
+demo_con_style(axs[2, 2], "bar,angle=180,fraction=-0.2")
+
+for ax in axs.flat:
+    ax.set(xlim=(0, 1), ylim=(0, 1), xticks=[], yticks=[], aspect=1)
+fig.tight_layout(pad=0.2)
+
+plt.savefig("../figures/annotation-connection-styles.pdf")
+# plt.show()