This function takes in a plan of study and a course, then checks for potential data entry issues. It will detect issues in formatting with the csv (such as notes creating empty rows), if there are cycles in the network, and if pre- and corequisites are appropriately defined.
admissibility_test(plan_of_study)List of errors to correct for cycles, prereqs, and coreqs
igraph object - An igraph object created using the create_plan_of_study function