Creates an empty exercise data frame.
See also
Other support functions:
create_exercise_csv()
,
create_exercise_excel()
,
read_exercise_csv()
,
read_exercise_excel()
,
set_pending_answers()
,
vector_to_string()
,
write_exercise_csv()
Creates an empty exercise data frame.
Other support functions:
create_exercise_csv()
,
create_exercise_excel()
,
read_exercise_csv()
,
read_exercise_excel()
,
set_pending_answers()
,
vector_to_string()
,
write_exercise_csv()