diff --git a/examples/units/basic_units.py b/examples/units/basic_units.py
index f8425f1ec45c..fa83f7643b1a 100644
--- a/examples/units/basic_units.py
+++ b/examples/units/basic_units.py
@@ -328,8 +328,12 @@ def axisinfo(unit, axis):
label=unit.fullname,
)
elif unit == degrees:
+ if rcParams['_internal.classic_mode']:
+ locator = ticker.ClassicAutoLocator()
+ else:
+ locator = ticker.AutoLocator()
return units.AxisInfo(
- majloc=ticker.AutoLocator(),
+ majloc=locator,
majfmt=ticker.FormatStrFormatter(r'$%i^\circ$'),
label=unit.fullname,
)
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
index 3c578d431adc..333140f8c293 100644
--- a/lib/matplotlib/axis.py
+++ b/lib/matplotlib/axis.py
@@ -654,6 +654,7 @@ def __init__(self, axes, pickradius=15):
# Initialize here for testing; later add API
self._major_tick_kw = dict()
self._minor_tick_kw = dict()
+ self._tick_space = None
self.cla()
self._set_scale('linear')
@@ -710,7 +711,10 @@ def get_children(self):
def cla(self):
'clear the current axis'
- self.set_major_locator(mticker.AutoLocator())
+ if rcParams['_internal.classic_mode']:
+ self.set_major_locator(mticker.ClassicAutoLocator())
+ else:
+ self.set_major_locator(mticker.AutoLocator())
self.set_major_formatter(mticker.ScalarFormatter())
self.set_minor_locator(mticker.NullLocator())
self.set_minor_formatter(mticker.NullFormatter())
@@ -785,6 +789,7 @@ def set_tick_params(self, which='major', reset=False, **kw):
for tick in self.minorTicks:
tick._apply_params(**self._minor_tick_kw)
self.stale = True
+ self._tick_space = None
@staticmethod
def _translate_tick_kw(kw, to_init_kw=True):
@@ -1665,6 +1670,13 @@ def axis_date(self, tz=None):
tz = pytz.timezone(tz)
self.update_units(datetime.datetime(2009, 1, 1, 0, 0, 0, 0, tz))
+ def get_tick_space(self):
+ """
+ Return the estimated number of ticks that can fit on the axis.
+ """
+ # Must be overridden in the subclass
+ raise NotImplementedError()
+
class XAxis(Axis):
__name__ = 'xaxis'
@@ -1988,6 +2000,18 @@ def set_default_intervals(self):
self.axes.viewLim.intervalx = xmin, xmax
self.stale = True
+ def get_tick_space(self):
+ if self._tick_space is None:
+ ends = self.axes.transAxes.transform([[0, 0], [1, 0]])
+ length = ((ends[1][0] - ends[0][0]) / self.axes.figure.dpi) * 72.0
+ tick = self._get_tick(True)
+ # There is a heuristic here that the aspect ratio of tick text
+ # is no more than 4:1
+ size = tick.label1.get_size() * 4
+ size *= np.cos(np.deg2rad(tick.label1.get_rotation()))
+ self._tick_space = np.floor(length / size)
+ return self._tick_space
+
class YAxis(Axis):
__name__ = 'yaxis'
@@ -2318,3 +2342,14 @@ def set_default_intervals(self):
if not viewMutated:
self.axes.viewLim.intervaly = ymin, ymax
self.stale = True
+
+ def get_tick_space(self):
+ if self._tick_space is None:
+ ends = self.axes.transAxes.transform([[0, 0], [0, 1]])
+ length = ((ends[1][1] - ends[0][1]) / self.axes.figure.dpi) * 72.0
+ tick = self._get_tick(True)
+ # Having a spacing of at least 2 just looks good.
+ size = tick.label1.get_size() * 2.0
+ size *= np.cos(np.deg2rad(tick.label1.get_rotation()))
+ self._tick_space = np.floor(length / size)
+ return self._tick_space
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index 450869878c14..d9aeb0b15ae9 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -1449,6 +1449,48 @@ def view_limits(self, dmin, dmax):
return np.take(self.bin_boundaries(dmin, dmax), [0, -1])
+class AutoSpacedLocator(MaxNLocator):
+ """
+ Behaves like a MaxNLocator, except N is automatically determined
+ from the length of the axis.
+ """
+ def __init__(self, *args, **kwargs):
+ """
+ Keyword args:
+
+ *steps*
+ Sequence of nice numbers starting with 1 and ending with 10;
+ e.g., [1, 2, 4, 5, 10]
+
+ *integer*
+ If True, ticks will take only integer values.
+
+ *symmetric*
+ If True, autoscaling will result in a range symmetric
+ about zero.
+
+ *prune*
+ ['lower' | 'upper' | 'both' | None]
+ Remove edge ticks -- useful for stacked or ganged plots
+ where the upper tick of one axes overlaps with the lower
+ tick of the axes above it.
+ If prune=='lower', the smallest tick will
+ be removed. If prune=='upper', the largest tick will be
+ removed. If prune=='both', the largest and smallest ticks
+ will be removed. If prune==None, no ticks will be removed.
+
+ """
+ if 'nbins' in kwargs:
+ raise ValueError(
+ 'AutoSpacedLocator does not take nbins as an argument')
+ self.set_params(**self.default_params)
+ self.set_params(**kwargs)
+
+ def __call__(self):
+ self._nbins = max(self.axis.get_tick_space(), 3)
+ return super(AutoSpacedLocator, self).__call__()
+
+
def decade_down(x, base=10):
'floor x to the nearest lower decade'
if x == 0.0:
@@ -1872,7 +1914,13 @@ def tick_values(self, vmin, vmax):
return self.raise_if_exceeds(np.array(ticklocs))
-class AutoLocator(MaxNLocator):
+class AutoLocator(AutoSpacedLocator):
+ def __init__(self):
+ AutoSpacedLocator.__init__(self, steps=[1, 2, 5, 10])
+
+
+class ClassicAutoLocator(MaxNLocator):
+ # Used only for classic style
def __init__(self):
MaxNLocator.__init__(self, nbins=9, steps=[1, 2, 5, 10])
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