Suggest me a solution to design a symmetric matrix in Kobotoolbox. I would like to have have an option where the user can select list of places ( prepopulated ) and based on the list of selected places the symmetric matrix is designed. Subsequently, the user can insert the value (distance km in the example table) in the matrix.
| Place A | Place B | Place C | Place D | |
|---|---|---|---|---|
| Place A | 0 | 1 km | 4 km | 7 km |
| Place B | 0 | 5 km | 8 km | |
| Place C | 0 | 10 km | ||
| Place D | 0 |
