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 |