Equation (2), page 4 from Bluck, "Recent advances in the interpretation of the 13C octanoate breath test for gastric emptying"

cum_exp_beta(minute, dose, cf)

## Arguments

minute time in minutes in mg named vector of coefficients; only k and beta are required. Note that k is measured in 1/min (e_g_ 0_01/min), while often it is quoted as 1/h (e_g_ 0_6/h).

## Value

Vector of predicted cumulative pdr

exp_beta