Fix bug introduced in 8308: allow vmin == vmax

efiring · efiring · commit a331393e8fde · 2010-05-21T18:26:12.000Z
svn path=/trunk/matplotlib/; revision=8331
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -810,11 +810,8 @@ def __call__(self, value, clip=None):
     def inverse(self, value):
         if not self.scaled():
             raise ValueError("Not invertible until scaled")
-        vmin, vmax = self.vmin, self.vmax
-        if vmin >= vmax:
-            raise ValueError("Inversion requires valid vmax > vmin")
-        vmin = float(vmin)
-        vmax = float(vmax)
+        vmin = float(self.vmin)
+        vmax = float(self.vmax)
 
         if cbook.iterable(value):
             val = ma.asarray(value)
diff --git a/lib/matplotlib/dates.py b/lib/matplotlib/dates.py
@@ -512,7 +512,7 @@ def _get_interval(self):
         Return the number of units for each tick.
         """
         return 1
-    
+
     def nonsingular(self, vmin, vmax):
         unit = self._get_unit()
         interval = self._get_interval()
@@ -561,7 +561,7 @@ def __call__(self):
         if estimate > self.MAXTICKS * 2:
             raise RuntimeError(
                 'RRuleLocator estimated to generate %d ticks from %s to %s: exceeds Locator.MAXTICKS * 2 (%d) ' % (estimate, dmin, dmax, self.MAXTICKS * 2))
-            
+
         dates = self.rule.between(dmin, dmax, True)
         if len(dates) == 0:
             return date2num([dmin, dmax])
@@ -597,7 +597,7 @@ def get_unit_generic(freq):
 
     def _get_interval(self):
         return self.rule._rrule._interval
-    
+
     def autoscale(self):
         """
         Set the view limits to include the data range.
@@ -868,7 +868,7 @@ def autoscale(self):
         vmax = date2num(vmax)
         return self.nonsingular(vmin, vmax)
 
-    
+
 class MonthLocator(RRuleLocator):
     """
     Make ticks on occurances of each month month, eg 1, 3, 12.
@@ -925,7 +925,7 @@ def __init__(self,  bymonthday=None, interval=1, tz=None):
                          interval=interval, **self.hms0d)
         RRuleLocator.__init__(self, o, tz)
 
-        
+
 class HourLocator(RRuleLocator):
     """
     Make ticks on occurances of each hour.
@@ -943,7 +943,7 @@ def __init__(self,  byhour=None, interval=1, tz=None):
                             byminute=0, bysecond=0)
         RRuleLocator.__init__(self, rule, tz)
 
-    
+
 class MinuteLocator(RRuleLocator):
     """
     Make ticks on occurances of each minute.
@@ -961,7 +961,7 @@ def __init__(self,  byminute=None, interval=1, tz=None):
                             bysecond=0)
         RRuleLocator.__init__(self, rule, tz)
 
-        
+
 class SecondLocator(RRuleLocator):
     """
     Make ticks on occurances of each second.
