如何用第一个df中的值替换NaN值:
country sex year cancer
0 Albania female 2000 32
1 Albania male 2000 58
2 Antigua female 2000 2
3 Antigua male 2000 5
4 Argen female 2000 591
5 Argen male 2000 2061
在第二个df中:
country year sex cancer
0 Albania 1985 female NaN
1 Albania 1985 male NaN
2 Albania 1986 female NaN
3 Albania 1986 male NaN
4 Albania 1987 female 25.0
5 Antigua 1992 male NaN
6 Antigua 1985 female NaN
最终结果应该如下所示:
country year sex cancer
0 Albania 1985 female 32
1 Albania 1985 male 58
2 Albania 1986 female 32
3 Albania 1986 male 58
4 Albania 1987 female 25
5 Antigua 1992 male 5
6 Antigua 1985 female 2
重要的两个条件是国家和性别
我最终使用了
fillna
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