matplotlib
diff --git a/‎lib/matplotlib/_mathtext.py
Lines changed: 26 additions & 11 deletions b/‎lib/matplotlib/_mathtext.py
Lines changed: 26 additions & 11 deletions
diff --git a/‎lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_03.pdf
-93 Bytes b/‎lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_03.pdf
-93 Bytes
diff --git a/‎lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_03.png
90 Bytes b/‎lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_03.png
90 Bytes
@@ -2759,6 +2759,9 @@ def subsuper(self, s, loc, toks):
 
     def _genfrac(self, ldelim, rdelim, rule, style, num, den):
         state = self.get_state()
+        cap_height = state.font_output.get_metrics(
+            state.font, mpl.rcParams['mathtext.default'],
+            'H', state.fontsize, state.dpi).height
         thickness = state.font_output.get_underline_thickness(
             state.font, state.fontsize, state.dpi)
 
@@ -2767,26 +2770,38 @@ def _genfrac(self, ldelim, rdelim, rule, style, num, den):
         if style is not self._MathStyle.DISPLAYSTYLE:
             num.shrink()
             den.shrink()
+            min_clearance = np.ceil(0.5 * thickness)
+            cap_height *= 0.7
+        else:
+            min_clearance = 1.5 * thickness
         cnum = HCentered([num])
         cden = HCentered([den])
         width = max(num.width, den.width)
         cnum.hpack(width, 'exactly')
         cden.hpack(width, 'exactly')
-        vlist = Vlist([cnum,                      # numerator
-                       Vbox(0, thickness * 2.0),  # space
-                       Hrule(state, rule),        # rule
-                       Vbox(0, thickness * 2.0),  # space
-                       cden                       # denominator
-                       ])
+
+        numerator_padding = max(
+            3/5 * cap_height - cnum.depth, min_clearance) - thickness
+        denominator_padding = max(
+            4/3 * cap_height - cden.height, min_clearance) + thickness
+        vlist_builder = []
+        if cnum.height < cap_height:
+            vlist_builder.append(Vbox(0, cap_height - cnum.height))
+        vlist_builder += [cnum,                          # numerator
+                          Vbox(0, numerator_padding),    # space
+                          Hrule(state, rule),            # rule
+                          Vbox(0, denominator_padding),  # space
+                          cden                           # denominator
+                          ]
+        vlist = Vlist(vlist_builder)
 
         # Shift so the fraction line sits in the middle of the
-        # equals sign
+        # minus sign
         metrics = state.font_output.get_metrics(
             state.font, mpl.rcParams['mathtext.default'],
-            '=', state.fontsize, state.dpi)
-        shift = (cden.height -
-                 ((metrics.ymax + metrics.ymin) / 2 -
-                  thickness * 3.0))
+            '\u2212', state.fontsize, state.dpi)
+        shift = (denominator_padding + cden.height -
+                 (metrics.ymax + metrics.ymin) / 2 - rule / 2)
         vlist.shift_amount = shift
 
         result = [Hlist([vlist, Hbox(thickness * 2.)])]