frame.reindex(index=['a','b','c','d'],method='ffill',columns=states)
报错: index must be monotonic increasing or decreasing
修改代码: 把 method='ffill'拿出来
注意, 是 method 的方法, 参数 ffill 后面加 "()"
- frame4=frame.reindex(index=['a','b','c','d'],
- columns=states).ffill()
结果为:
- Texas Utah California
- a 1.0 NaN 2.0
- b NaN NaN NaN
- c 4.0 NaN 5.0
- d 7.0 NaN 8.0
- ----------------
来源: http://www.bubuko.com/infodetail-3402268.html