Update plot_2d_landscape_for_nonseparable_functions.py

Author: Evolutionary-Intelligence

tutorials/plot_2d_landscape_for_nonseparable_functions.py

@@ -23,7 +23,7 @@ def cd(x):  # from https://arxiv.org/pdf/1610.00040v1.pdf
 def plot_contour(func, x, y):
     x, y, z = generate_xyz(func, x, y, 500)
     plt.contourf(x, y, z, cmap='cool')
-    plt.contour(x, y, z, colors='white', alpha=0.5)
+    plt.contour(x, y, z, colors='white')
 
 
 if __name__ == '__main__':