Natural mortality at age — get

Constructs a vector of natural mortality (M) at age values using a declining early-age curve and late-age increase.

Usage

get_M(min_age, max_age, age_increase_M, m0, m4, m10, m30)

min_age: Numeric scalar. Minimum model age.
max_age: Numeric scalar. Maximum model age.
age_increase_M: Numeric scalar. Age at which M begins to increase again.
m0: Numeric scalar. Natural mortality rate at ages 1 and 2.
m4: Numeric scalar. Natural mortality rate at age 4 (controls slope of decline).
m10: Numeric scalar. Natural mortality rate at age 10 (base for flat zone).
m30: Numeric scalar. Natural mortality rate at age 30 (terminal age M).

A numeric vector of length max_age - min_age + 1 containing natural mortality rates at each age.