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bug fix #2325

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bug fix #2325

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10 changes: 5 additions & 5 deletions nltk/probability.py
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Expand Up @@ -1904,7 +1904,7 @@ def plot(self, *args, **kwargs):
:type conditions: list
"""
try:
from matplotlib import plt
import matplotlib.pyplot as plt
except ImportError:
raise ValueError(
'The plot function requires matplotlib to be installed.'
Expand All @@ -1917,12 +1917,12 @@ def plot(self, *args, **kwargs):
title = _get_kwarg(kwargs, 'title', '')
samples = _get_kwarg(
kwargs, 'samples', sorted(set(v for c in conditions
if v in self
for v in self[c]))
for v in self[c]
if v in self))
) # this computation could be wasted
if "linewidth" not in kwargs:
kwargs["linewidth"] = 2

ax = plt.gca()
for condition in conditions:
if cumulative:
freqs = list(self[condition]._cumulative_frequencies(samples))
Expand All @@ -1942,7 +1942,7 @@ def plot(self, *args, **kwargs):

ax.legend(loc=legend_loc)
ax.grid(True, color="silver")
ax.set_xticks(range(len(samples)), [text_type(s) for s in samples], rotation=90)
ax.set_xticklabels([text_type(s) for s in samples])
if title:
ax.set_title(title)
ax.set_xlabel("Samples")
Expand Down