Merge pull request #7959 from scopatz/size0tick

dstansby · NelleV · commit 729d2193ae60 · 2017-01-29T12:20:55.000-08:00
Allow zero sized ticks
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
@@ -2021,7 +2021,10 @@ def get_tick_space(self):
         # There is a heuristic here that the aspect ratio of tick text
         # is no more than 3:1
         size = tick.label1.get_size() * 3
-        return int(np.floor(length / size))
+        if size > 0:
+            return int(np.floor(length / size))
+        else:
+            return 2**31 - 1
 
 
 class YAxis(Axis):
@@ -2354,4 +2357,7 @@ def get_tick_space(self):
         tick = self._get_tick(True)
         # Having a spacing of at least 2 just looks good.
         size = tick.label1.get_size() * 2.0
-        return int(np.floor(length / size))
+        if size > 0:
+            return int(np.floor(length / size))
+        else:
+            return 2**31 - 1
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -2301,6 +2301,16 @@ def test_manage_xticks():
     assert_array_equal(old_xlim, new_xlim)
 
 
+@cleanup
+def test_tick_space_size_0():
+    # allow font size to be zero, which affects ticks when there is
+    # no other text in the figure.
+    plt.plot([0, 1], [0, 1])
+    matplotlib.rcParams.update({'font.size': 0})
+    b = io.BytesIO()
+    plt.savefig(b, dpi=80, format='raw')
+
+
 @image_comparison(baseline_images=['errorbar_basic', 'errorbar_mixed',
                                    'errorbar_basic'])
 def test_errorbar():
