Generic method for population_alive
Usage
population_alive(object, t, a1 = 0, a2 = Inf, ...)
Arguments
- object
A population.
- t
A numeric indicating the time at which alive individuals are observed.
- a1
0 by default. Lower bound for age.
- a2
Inf by default. Upper bound for age.
- ...
Additional params.
Value
All individuals alive at time t and of age in [a1,a2).