diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
index a5a248c156bd..f0d3fa2d7462 100644
--- a/lib/matplotlib/rcsetup.py
+++ b/lib/matplotlib/rcsetup.py
@@ -1093,6 +1093,7 @@ def validate_animation_writer_path(p):
'axes.formatter.use_locale': [False, validate_bool],
# Use the current locale to format ticks
'axes.formatter.use_mathtext': [False, validate_bool],
+ 'axes.formatter.min_exponent': [0, validate_int], # minimum exponent to format in scientific notation
'axes.formatter.useoffset': [True, validate_bool],
'axes.formatter.offset_threshold': [4, validate_int],
'axes.unicode_minus': [True, validate_bool],
diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
index d6eee0d6d7bd..346ad27f1b65 100644
--- a/lib/matplotlib/tests/test_ticker.py
+++ b/lib/matplotlib/tests/test_ticker.py
@@ -332,6 +332,26 @@ def test_blank(self):
assert formatter(10**0.1) == ''
+class TestLogFormatterMathtext():
+ fmt = mticker.LogFormatterMathtext()
+ test_data = [
+ (0, 1, '$\\mathdefault{10^{0}}$'),
+ (0, 1e-2, '$\\mathdefault{10^{-2}}$'),
+ (0, 1e2, '$\\mathdefault{10^{2}}$'),
+ (3, 1, '$\\mathdefault{1}$'),
+ (3, 1e-2, '$\\mathdefault{0.01}$'),
+ (3, 1e2, '$\\mathdefault{100}$'),
+ (3, 1e-3, '$\\mathdefault{10^{-3}}$'),
+ (3, 1e3, '$\\mathdefault{10^{3}}$'),
+ ]
+
+ @pytest.mark.parametrize('min_exponent, value, expected', test_data)
+ def test_min_exponent(self, min_exponent, value, expected):
+ with matplotlib.rc_context({'axes.formatter.min_exponent':
+ min_exponent}):
+ assert self.fmt(value) == expected
+
+
class TestLogFormatterSciNotation(object):
test_data = [
(2, 0.03125, '${2^{-5}}$'),
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index ddfae88619a5..cec1476a99d4 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -1084,7 +1084,7 @@ def _non_decade_format(self, sign_string, base, fx, usetex):
return (r'$%s%s^{%.2f}$') % (sign_string, base, fx)
else:
return ('$%s$' % _mathdefault('%s%s^{%.2f}' %
- (sign_string, base, fx)))
+ (sign_string, base, fx)))
def __call__(self, x, pos=None):
"""
@@ -1093,6 +1093,8 @@ def __call__(self, x, pos=None):
The position `pos` is ignored.
"""
usetex = rcParams['text.usetex']
+ min_exp = rcParams['axes.formatter.min_exponent']
+
if x == 0: # Symlog
if usetex:
return '$0$'
@@ -1108,6 +1110,8 @@ def __call__(self, x, pos=None):
is_x_decade = is_close_to_int(fx)
exponent = np.round(fx) if is_x_decade else np.floor(fx)
coeff = np.round(x / b ** exponent)
+ if is_x_decade:
+ fx = nearest_long(fx)
if self.labelOnlyBase and not is_x_decade:
return ''
@@ -1120,7 +1124,13 @@ def __call__(self, x, pos=None):
else:
base = '%s' % b
- if not is_x_decade:
+ if np.abs(fx) < min_exp:
+ if usetex:
+ return r'${0}{1:g}$'.format(sign_string, x)
+ else:
+ return '${0}$'.format(_mathdefault(
+ '{0}{1:g}'.format(sign_string, x)))
+ elif not is_x_decade:
return self._non_decade_format(sign_string, base, fx, usetex)
else:
if usetex:
diff --git a/matplotlibrc.template b/matplotlibrc.template
index e57dfd9ada2d..9568e27d10d2 100644
--- a/matplotlibrc.template
+++ b/matplotlibrc.template
@@ -315,6 +315,7 @@ backend : $TEMPLATE_BACKEND
# separator in the fr_FR locale.
#axes.formatter.use_mathtext : False # When True, use mathtext for scientific
# notation.
+#axes.formatter.min_exponent: 0 # minimum exponent to format in scientific notation
#axes.formatter.useoffset : True # If True, the tick label formatter
# will default to labeling ticks relative
# to an offset when the data range is
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