Pandas —> Need an index for each group element
Question:
My df:
name
date
value
A
2009-06-30
some value 1
A
2010-06-30
some value 2
A
2011-06-30
some value 3
B
2019-12-31
some value 4
B
2020-12-31
some value 5
B
2021-12-31
some value 6
I want
name
date
value
position
A
2009-06-30
some value 1
2
A
2010-06-30
some value 2
1
A
2011-06-30
some value 3
0
B
2019-12-31
some value 4
2
B
2020-12-31
some value 5
1
B
2021-12-31
some value 6
0
The final view will look like this (maybe pivot)
name
0
1
2
A
some value 3
some value 2
some value 1
B
some value 6
some value 5
some value 4
This is a serious problem for me. Please help)
Answers:
My df:
| name | date | value |
|---|---|---|
| A | 2009-06-30 | some value 1 |
| A | 2010-06-30 | some value 2 |
| A | 2011-06-30 | some value 3 |
| B | 2019-12-31 | some value 4 |
| B | 2020-12-31 | some value 5 |
| B | 2021-12-31 | some value 6 |
I want
| name | date | value | position |
|---|---|---|---|
| A | 2009-06-30 | some value 1 | 2 |
| A | 2010-06-30 | some value 2 | 1 |
| A | 2011-06-30 | some value 3 | 0 |
| B | 2019-12-31 | some value 4 | 2 |
| B | 2020-12-31 | some value 5 | 1 |
| B | 2021-12-31 | some value 6 | 0 |
The final view will look like this (maybe pivot)
| name | 0 | 1 | 2 |
|---|---|---|---|
| A | some value 3 | some value 2 | some value 1 |
| B | some value 6 | some value 5 | some value 4 |
This is a serious problem for me. Please help)