Estimate skew normal alpha parameter from proportion of presymptomatic transmission

presymptomatic_transmission_to_alpha(presymptomatic_transmission)

Arguments

presymptomatic_transmission: a numeric scalar probability (between 0 and 1 inclusive): proportion of transmission that occurs before symptom onset.

Value

A numeric scalar: The $minimum output from optimise() to find the best alpha parameter to get the desired proportion of presymptomatic transmission.

Details

Since there isn't any analytical expression for linking the two, the value of alpha that corresponds to the given proportion presymptomatic is obtained via numeric optimisation.