Python高级数据处理与可视化（五）---- Python的理工类应用 & Python人文社科类应用

# -*- coding: utf-8 -*-
"""
Created on Tue Jan 24 13:07:01 2017

@author: Wayne
"""

from nltk.corpus import inaugural
from nltk.probability import ConditionalFreqDist
from matplotlib import pyplot as plt

cfd = ConditionalFreqDist(                       # 条件频率统计
(fileid, len(w))                     # 根据单词长度进行统计
for fileid in inaugural.fileids()
for w in inaugural.words(fileid)
if fileid>'1950')                    # 1950年以后
print cfd.items()[:40]
cfd.plot()