Anurag Pandey - 10 months ago 47

Python Question

i have two data frames predictor_df and solution_df like this :

`predictor_df`

1000 A B C

1001 1 2 3

1002 4 5 6

1003 7 8 9

1004 Nan Nan Nan

`and a solution_df`

0 D

1 10

2 11

3 12

the reason for the names is that the predictor_df is used to do some analysis on it's columns to arrive at analysis_df . My analysis leaves the rows with Nan values in predictor_df and hence the

Now i want to know how to join these two dataframes to obtain my final dataframe as

`A B C D`

1 2 3 10

4 5 6 11

7 8 9 12

Nan Nan Nan

please guide me through it . thanks in advance.

Edit : i tried to merge the two dataframes but the result comes like this ,

`A B C D`

1 2 3 Nan

4 5 6 Nan

7 8 9 Nan

Nan Nan Nan

Edit 2 : also when i do

`pd.concat([predictor_df, solution_df], axis = 1)`

it becomes like this

`A B C D`

Nan Nan Nan 10

Nan Nan Nan 11

Nan Nan Nan 12

Nan Nan Nan Nan

Answer

You could use `reset_index`

with `drop=True`

which resets the index to the default integer index.

```
pd.concat([df_1.reset_index(drop=True), df_2.reset_index(drop=True)], axis=1)
A B C D
0 1 2 3 10.0
1 4 5 6 11.0
2 7 8 9 12.0
3 Nan Nan Nan NaN
```

Source (Stackoverflow)