matplotlib
diff --git a/‎lib/matplotlib/axes/_base.py‎
Lines changed: 7 additions & 2 deletions b/‎lib/matplotlib/axes/_base.py‎
Lines changed: 7 additions & 2 deletions
diff --git a/‎lib/matplotlib/ticker.py‎
Lines changed: 5 additions & 9 deletions b/‎lib/matplotlib/ticker.py‎
Lines changed: 5 additions & 9 deletions
@@ -523,6 +523,9 @@ def __init__(self, fig, rect,
         self._hold = rcParams['axes.hold']
         self._connected = {}  # a dict from events to (id, func)
         self.cla()
+        # funcs used to format x and y - fall back on major formatters
+        self.fmt_xdata = None
+        self.fmt_ydata = None
 
         self.set_cursor_props((1, 'k'))  # set the cursor properties for axes
 
@@ -3265,10 +3268,12 @@ def yaxis_date(self, tz=None):
         self.yaxis.axis_date(tz)
 
     def format_xdata(self, x):
-        return self.xaxis.get_major_formatter().format_for_cursor(x)
+        return (self.fmt_xdata(x) if self.fmt_xdata is not None
+                else self.xaxis.get_major_formatter().format_for_cursor(x))
 
     def format_ydata(self, y):
-        return self.yaxis.get_major_formatter().format_for_cursor(y)
+        return (self.fmt_ydata(y) if self.fmt_ydata is not None
+                else self.yaxis.get_major_formatter().format_for_cursor(y))
 
     def format_coord(self, x, y):
         """Return a format string formatting the *x*, *y* coord"""
 
@@ -319,18 +319,14 @@ class ScalarFormatter(Formatter):
     axes.formatter.limits rc parameter.
     """
 
-    def __init__(self, *args, **kwargs):
-        # Keyword-only arguments.
-        use_offset = kwargs.pop("use_offset", None)
-        use_mathtext = kwargs.pop("use_mathtext", None)
-        use_locale = kwargs.pop("use_locale", None)
-        super(ScalarFormatter, self).__init__(*args, **kwargs)
-        self._use_offset = (use_offset if use_offset is not None
+    def __init__(self, useOffset=None, useMathText=None, useLocale=None):
+        super(ScalarFormatter, self).__init__()
+        self._use_offset = (useOffset if useOffset is not None
                             else rcParams["axes.formatter.useoffset"])
         self._usetex = rcParams["text.usetex"]
-        self._use_mathtext = (use_mathtext if use_mathtext is not None
+        self._use_mathtext = (useMathText if useMathText is not None
                               else rcParams["axes.formatter.use_mathtext"])
-        self._use_locale = (use_locale if use_locale is not None
+        self._use_locale = (useLocale if useLocale is not None
                             else rcParams["axes.formatter.use_locale"])
         self._scientific = True
         self._powerlimits = rcParams['axes.formatter.limits']