Used to overcome the loss of variables (age, time since quit) in single years in the Health Surveys for England 2015+.
Arguments
- x
Character - the age/time category e.g. "15-20".
- lkup
Data.table. Defaults to NULL. Must have column names ind, var, p.
E.g. ind = endsmoke_cat, var = years_since_quit, p = probability.
Value
Returns an integer.
Details
Takes a category with beginning and end separated by "-" and randomly assigns each observation a number within the age category.
Or uses a lookup file to sample from the probability distribution of single values within each category.
Examples
num_sim("15-20")
#> [1] 19
