sum numbers in two dataframes based on their intersecting indexes
Question:
i have 2 dataframes with some common index and some that are not:
df1
DATA
1 1
2 2
3 3
4 4
5 5
df2
DATA
3 3
4 4
5 5
6 6
7 7
I want to sum/take max (i actually need both for different cols) them, and consider missing indexes as 0.
In this example the result should be:
df_results
DATA
1 1
2 2
3 6
4 8
5 10
6 6
7 7
where 3,4,5 were summed, but the rest remained the same.
Thx!
Answers:
Try this:
combined = df1.add(df2, fill_value=0)
i have 2 dataframes with some common index and some that are not:
df1
DATA
1 1
2 2
3 3
4 4
5 5
df2
DATA
3 3
4 4
5 5
6 6
7 7
I want to sum/take max (i actually need both for different cols) them, and consider missing indexes as 0.
In this example the result should be:
df_results
DATA
1 1
2 2
3 6
4 8
5 10
6 6
7 7
where 3,4,5 were summed, but the rest remained the same.
Thx!
Try this:
combined = df1.add(df2, fill_value=0)