When I run this code
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')
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?
Put
import matplotlib.pyplot as plt
at the top, and
plt.show()
at the end.
在IPython笔记本中,您还可以在笔记本顶部使用%matplotlib inline
,以自动在输出单元格中显示创建的图。
your code is correct. just put:
import matplotlib as plt
for diplaying you plot:
plt.show()
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.