Matplotlib图未显示 [英] Matplotlib plot is a no-show

问题描述

当我运行这段代码时

import pandas as pd
import numpy as np
def add_prop(group):
    births = group.births.astype(float)
    group['prop'] = births/births.sum()
    return group

pieces = []
columns = ['name', 'sex', 'births']

for year in range(1880, 2012):
    path = 'yob%d.txt' % year
    frame = pd.read_csv(path, names = columns)
    frame['year'] = year
    pieces.append(frame)
    names = pd.concat(pieces, ignore_index = True)

total_births = names.pivot_table('births', rows = 'year', cols = 'sex', aggfunc = sum)
total_births.plot(title = 'Total Births by sex and year')

我没有情节.这摘自Wes McKinney的书，该书使用Python进行数据分析. 谁能指出我正确的方向?

I get no plot. This is from Wes McKinney's book on using Python for data analysis. Can anyone point me in the right direction?

推荐答案

输入

import matplotlib.pyplot as plt

位于顶部，

plt.show()

最后.

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