Input should be a csv file.
Dates should be YYYY-MM-DD.
Option 1 : one row per date (ordered) and one column per contender
| Date | Name1 | Name2 |
|---|
| 2018-01-01 | 1 | 1 |
| 2018-02-01 | 2 | 3 |
| 2018-03-01 | 4 | 7 |
Option 2 : one row per contender and per date
| Date | Name | Value |
|---|
| 2018-01-01 | Name1 | 1 |
| 2018-01-01 | Name2 | 3 |
| 2018-02-01 | Name1 | 2 |
| 2018-02-01 | Name2 | 3 |
| 2018-03-01 | Name1 | 4 |
| 2018-03-01 | Name2 | 7 |