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[WIP] Proposed improvement in default log formatting #4730

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[WIP] Proposed improvement in default log formatting #4730

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8 changes: 5 additions & 3 deletions lib/matplotlib/ticker.py
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Original file line number Diff line number Diff line change
Expand Up @@ -733,6 +733,8 @@ def pprint_val(self, x, d):
return s


SPECIAL_LOG = set((0, 0.1, 1, 10))

class LogFormatterExponent(LogFormatter):
"""
Format values for log axis; using ``exponent = log_base(value)``
Expand Down Expand Up @@ -776,11 +778,11 @@ def __call__(self, x, pos=None):
usetex = rcParams['text.usetex']

# only label the decades
if x == 0:
if x in SPECIAL_LOG:
if usetex:
return '$0$'
return '${0:g}$'.format(x)
else:
return '$\mathdefault{0}$'
return '$\mathdefault{{{0:g}}}$'.format(x)

fx = math.log(abs(x)) / math.log(b)
is_decade = is_close_to_int(fx)
Expand Down