An example dataset to use with the diversity-based assignment model.
Format
## `dba_gc_ex001` A data frame with 4 rows and 4 columns.
* id: the student id of each students, simply the integers 1 to 4. * major: the primary major of each student. * skill: the skill level of each student. * groups: the self-formed groups submitted by each student. In this case, student is in his/her own group.