matplotlib
diff --git a/‎lib/matplotlib/ticker.py
Copy file name to clipboardExpand all lines: lib/matplotlib/ticker.py
+8-12Lines changed: 8 additions & 12 deletions b/‎lib/matplotlib/ticker.py
Copy file name to clipboardExpand all lines: lib/matplotlib/ticker.py
+8-12Lines changed: 8 additions & 12 deletions
@@ -1629,22 +1629,18 @@ def show_tick_label(self, ticklocs):
         numdec = abs(vmax - vmin)
 
         if numdec > 3:
+            # Label only bases
             sublabel = set((1,))
-        elif numdec > 2:
-            sublabel = set((1, 3))
-        elif numdec > 1:
-            sublabel = set((1, 2, 5))
         else:
-            sublabel = set((1, 2, 4, 7))
+            # Add labels between bases at log-spaced coefficients
+            c = np.logspace(0, 1, (4 - int(numdec)) + 1, base=b)
+            sublabel = set(np.round(c))
 
-        label = np.ones(ticklocs.size, dtype=np.bool)
-        for i, loc in enumerate(ticklocs):
-            exponent = math.floor(math.log(abs(loc)) / math.log(b))
-            coeff = loc / b ** nearest_long(exponent)
-            if nearest_long(coeff) not in sublabel:
-                label[i] = False
+        show_label = np.ones(ticklocs.size, dtype=np.bool)
+        exponents = np.floor(np.log(abs(ticklocs)) / np.log(b))
+        coeffs = np.round(ticklocs / b ** exponents)
 
-        return label
+        return [c in sublabel for c in coeffs]
 
     def view_limits(self, vmin, vmax):
         'Try to choose the view limits intelligently'