stanbkt.utils.KCData#

class stanbkt.utils.KCData(correctness, student_inter_dict, lengths, student_ids, problem_ids, groups=None, group_2_index=None)#

Bases: object

Structured data container for a single knowledge component.

Stores preprocessed interaction data for a KC, including correctness matrix, student/problem identifiers, and optional group assignments.

Variables:

  • correctness (np.ndarray) – Correctness matrix of shape (num_students, num_problems).

  • student_inter_dict (dict[str, StudentInteraction]) – Mapping of student IDs to their interaction sequences, used to preserve original problem IDs and interaction counts.

  • lengths (npt.NDArray[np.int32]) – Vector of interaction sequence lengths for each student.

  • student_ids (list[str]) – Student identifiers matching rows of correctness matrix.

  • problem_ids (list[str]) – Problem identifiers matching columns of correctness matrix.

  • groups (Optional[np.ndarray], default None) – Optional group array (e.g., student group assignments or problem difficulty groups).

  • group_2_index (Optional[dict[str, int]], default None) – Optional mapping from group ID to index in groups array.

Parameters:

  • correctness (ndarray)

  • student_inter_dict (dict[str, StudentInteraction])

  • lengths (ndarray[tuple[Any, ...], dtype[int32]])

  • student_ids (list[str])

  • problem_ids (list[str])

  • groups (ndarray | None)

  • group_2_index (dict[str, int] | None)

correctness: ndarray#
group_2_index: dict[str, int] | None#
groups: ndarray | None#
lengths: ndarray[tuple[Any, ...], dtype[int32]]#
problem_ids: list[str]#
student_ids: list[str]#
student_inter_dict: dict[str, StudentInteraction]#