df.reset_index(['Cat2'])
会将Cat2
索引转换为列。
例如,
In [38]: df
Out[38]:
average
Category Cat2
Beauty/Wellness/Healthcare 1 54.50
2 53.25
3 48.00
4 57.57
5 51.33
6 18.50
7 16.00
In [39]: df.reset_index(['Cat2'])
Out[39]:
Cat2 average
Category
Beauty/Wellness/Healthcare 1 54.50
Beauty/Wellness/Healthcare 2 53.25
Beauty/Wellness/Healthcare 3 48.00
Beauty/Wellness/Healthcare 4 57.57
Beauty/Wellness/Healthcare 5 51.33
Beauty/Wellness/Healthcare 6 18.50
Beauty/Wellness/Healthcare 7 16.00
要更改指数级别名称,使用df.index.names = ['foo', 'bar']
:
In [48]: df.index.names = ['foo', 'bar']
In [49]: df
Out[49]:
average
foo bar
Beauty/Wellness/Healthcare 1 54.50
2 53.25
3 48.00
4 57.57
5 51.33
6 18.50
7 16.00
TNX。但是,df.reset_index(['Cat2'])以某种方式在'df.index'中创建索引的重复项,因此无法按类别重新组合。 – NoIdeaHowToFixThis 2014-11-03 20:43:17
请发布'df.info()'和'df.index'。 – unutbu 2014-11-03 20:45:46
Index([u'Beauty/Wellness/Healthcare',u'Beauty/Wellness/Healthcare',u'Beauty/Wellness/Healthcare',u'Beauty/Wellness/Healthcare',u'Beauty/Wellness/Healthcare',u 'Beauty/Wellness/Healthcare',u'Beauty/Wellness/Healthcare',u'Food&Drink',u'Food&Drink',u'Food&Drink',u'Food&Drink',u'Food&Drink ',u'Food&Drink',u'Other',u'Other',u'Other',u'Other',u'Other',u'Other',u'Other',u'Other',u 'Other',u'Other'],dtype ='object') – NoIdeaHowToFixThis 2014-11-03 20:47:20