从数据自动生成图表

Matplotlib 数据可视化入门

Ariel Rokem

Data Scientist

为何自动化？

高效快捷
灵活
稳健
可复现

有多少种不同数据？

summer_2016_medals["Sport"]

ID
62            Rowing
65         Taekwondo
73          Handball
             ...
134759      Handball
135132    Volleyball
135205        Boxing
Name: Sport, Length: 976, dtype: object

获取列的唯一值

sports = summer_2016_medals["Sport"].unique()

print(sports)

['Rowing' 'Taekwondo' 'Handball' 'Wrestling' 
'Gymnastics' 'Swimming' 'Basketball' 'Boxing' 
'Volleyball' 'Athletics']

各项目身高柱状图

fig, ax = plt.subplots()

for sport in sports:
  sport_df = summer_2016_medals[summer_2016_medals["Sport"] == sport]

  ax.bar(sport, sport_df["Height"].mean(), 
         yerr=sport_df["Height"].std())

ax.set_ylabel("Height (cm)")
ax.set_xticklabels(sports, rotation=90)
plt.show()

由数据自动生成的图形

练习自动化可视化！

Matplotlib 数据可视化入门