Backport PR #21124: Tweak streamplot plot_types example.

timhoffm · meeseeksmachine · commit 71e23b85c71a · 2021-09-19T21:46:47.000Z
diff --git a/plot_types/arrays/streamplot.py b/plot_types/arrays/streamplot.py
@@ -13,16 +13,15 @@
 # make a stream function:
 X, Y = np.meshgrid(np.linspace(-3, 3, 256), np.linspace(-3, 3, 256))
 Z = (1 - X/2. + X**5 + Y**3) * np.exp(-X**2 - Y**2)
-Z = Z - Z.min()
 # make U and V out of the streamfunction:
 V = np.diff(Z[1:, :], axis=1)
 U = -np.diff(Z[:, 1:], axis=0)
 
 # plot:
 fig, ax = plt.subplots()
-# contour stream function
-ax.contour(X, Y, Z, colors='C1', alpha=0.5, zorder=1, linewidths=3)
+ax.grid(False)
+
 # plot stream plot
-ax.streamplot(X[1:, 1:], Y[1:, 1:], U, V, zorder=2)
+ax.streamplot(X[1:, 1:], Y[1:, 1:], U, V)
 
 plt.show()
