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第二章第三节数据重构2任务7 #3
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2.4.7:任务七:得出不同年龄的总的存活人数,然后找出存活人数的最高的年龄,最后计算存活人数最高的存活率(存活人数/总人数)
任务描述与答案个人认为不够符合,如存活人数的最高的年龄,答案实际为存活人数最多的年龄,存活人数最高的存活率实际为存货人数最高的年龄段的人数/总存活人数
1. 存活人数计算与总人数计算
可以使用
data['Survived'].value_counts()
(data为读取的result.csv文件)或者使用
data['Survived'].count()
data['Survived'].sum()
2. 找出存活人数的最高的年龄
对存活人数根据年龄做一个从大到小的排序,第一个即为年龄最大的存活人数
data[(data['Survived'].values==1)].sort_values(by='Age',ascending=False)
或者直接给出最大存活人数的年龄
3. 找出不同年龄的存活人数
4. 找出存活人数最多的年龄
survived_age[survived_age.values==survived_age.max()]
5. 计算各个年龄段的存活率
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