Generate default thresholds.
generate_thresholds(variable, lower, upper, sport, ...)generateDefaultThresholds(variable, lower, upper, sport, ...)
A vector of variables with user-specified thresholds.
A vector of lower limits correspodning to the elements of variable.
A vector of upper limits correspodning to the elements of variable.
A vector of sports (amongst 'cycling',
'running', 'swimming') with each element
corresponding to variable, lower and upper.
Currently not used.