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Data structure for exercise data.
exercise(exer, ...)# S3 method for default exercise(exer = NULL, ...)exercise_data(exer, ...)
# S3 method for default exercise(exer = NULL, ...)
exercise_data(exer, ...)
An exercise object.
an exercise object (default: NULL)
NULL
further parameters
exer <- exercise() # new exercise exer <- exercise(exer, x=3) # add x to the exercise
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