doc/tst

jklymak · jklymak · commit 1162001be58a · 2019-03-12T15:22:08.000-07:00
diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -187,13 +187,13 @@ def get_datalim(self, transData):
         # This operation depends on the transforms for the data in the
         # collection and whether the collection has offsets.
         #
-        # 1) offsets = None, transform = transData: use the paths for the
-        # automatic limits (i.e. for LineCollection in streamline).
-        # 2) offsets != None: offset_transform = transData:
-        #    a) transform = transData: use the path + offset for limits (i.e
-        #    for bar).
-        #    b) transform != transData: just use the offsets for the limits
-        #    (i.e. for scatter)
+        # 1) offsets = None, transform child of transData: use the paths for
+        # the automatic limits (i.e. for LineCollection in streamline).
+        # 2) offsets != None: offset_transform is child of transData:
+        #    a) transform is child of transData: use the path + offset for
+        #       limits (i.e for bar).
+        #    b) transform is not a child of transData: just use the offsets
+        #       for the limits (i.e. for scatter)
         # 3) otherwise return a null Bbox.
 
         transform = self.get_transform()
diff --git a/lib/matplotlib/tests/test_streamplot.py b/lib/matplotlib/tests/test_streamplot.py
@@ -92,11 +92,11 @@ def test_direction():
 
 def test_streamplot_limits():
     ax = plt.axes()
-    x = np.linspace(-5, 10, 20) + 25
-    y = np.linspace(-2, 4, 10) + 32
+    x = np.linspace(-5, 10, 20)
+    y = np.linspace(-2, 4, 10)
     y, x = np.meshgrid(y, x)
-#    trans = mtransforms.Affine2D().translate(25, 32) + ax.transData
-    plt.barbs(x, y, np.sin(x), np.cos(y))
+    trans = mtransforms.Affine2D().translate(25, 32) + ax.transData
+    plt.barbs(x, y, np.sin(x), np.cos(y), transform=trans)
     # The calculated bounds are approximately the bounds of the original data,
     # this is because the entire path is taken into account when updating the
     # datalim.
