Change streamplot default zorder to 2.

QuLogic · QuLogic · commit 9c506df298a4 · 2015-11-26T04:47:16.000-05:00
Way back before streamplot gained the zorder kwarg, it used the
LineCollection's default zorder, which was 2, but when the kwarg was
added, it defaulted to 1. So switch streamplot zorder from 1 back to 2
for consistency.
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -4442,7 +4442,7 @@ def stackplot(self, x, *args, **kwargs):
                          label_namer=None)
     def streamplot(self, x, y, u, v, density=1, linewidth=None, color=None,
                    cmap=None, norm=None, arrowsize=1, arrowstyle='-|>',
-                   minlength=0.1, transform=None, zorder=1, start_points=None):
+                   minlength=0.1, transform=None, zorder=2, start_points=None):
         if not self._hold:
             self.cla()
         stream_container = mstream.streamplot(self, x, y, u, v,
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
@@ -3368,7 +3368,7 @@ def step(x, y, *args, **kwargs):
 @_autogen_docstring(Axes.streamplot)
 def streamplot(x, y, u, v, density=1, linewidth=None, color=None, cmap=None,
                norm=None, arrowsize=1, arrowstyle='-|>', minlength=0.1,
-               transform=None, zorder=1, start_points=None, hold=None, data=None):
+               transform=None, zorder=2, start_points=None, hold=None, data=None):
     ax = gca()
     # allow callers to override the hold state by passing hold=True|False
     washold = ax.ishold()
diff --git a/lib/matplotlib/streamplot.py b/lib/matplotlib/streamplot.py
@@ -21,7 +21,7 @@
 
 def streamplot(axes, x, y, u, v, density=1, linewidth=None, color=None,
                cmap=None, norm=None, arrowsize=1, arrowstyle='-|>',
-               minlength=0.1, transform=None, zorder=1, start_points=None):
+               minlength=0.1, transform=None, zorder=2, start_points=None):
     """Draws streamlines of a vector flow.
 
     *x*, *y* : 1d arrays
