说我有以下熊猫数据框
const withMutation = gql => C => props => {
const [onSubmit, {data}] = useMutation (SIGNUP_GQL)
return <C onSubmit={onSubmit} data={data} />
}
const Signup = ({onSubmit, data}) => (
...
)
export default withMutation (SIGNUP_GQL) (Signup)
使我具有以下数据框
import numpy as np
import pandas as pd
说我要修改列+----+-----------+----------+----------+----------+
| | a | b | c | d |
|----+-----------+----------+----------+----------|
| 0 | 0.462955 | 0.605148 | 0.481413 | 0.848894 |
| 1 | 0.341476 | 0.611664 | 0.419806 | 0.6367 |
| 2 | 0.0773736 | 0.795014 | 0.635595 | 0.154184 |
+----+-----------+----------+----------+----------+
使得d
。
我可以使用d = a * b / c
和groupby
来获得以下内容
apply
这是我正在寻找的东西,因为它包含所需的值,但与所需的结果仍然相去甚远。
可以帮帮我吗?
编辑:该方法在我有很大过滤的情况下也应该可行。
答案 0 :(得分:4)
您实际上并不需要groupby
或任何函数(如果我不误会什么),只需定义即可:
df['d'] = df['a'] * df['b'] / df['c']
示例:
data = {'a':[0.462955,0.341476,0.0773736],'b':[0.605148,0.611664,0.795014],'c':[0.481413,0.419806,0.635595]}
df = pd.DataFrame(data)
df['d'] = df['a'] * df['b'] / df['c']
print(df)
输出:
a b c d
0 0.462955 0.605148 0.481413 0.581946
1 0.341476 0.611664 0.419806 0.497536
2 0.077374 0.795014 0.635595 0.096780