test-econ-model/include/population.hpp

18 lines
402 B
C++

#include <cmath>
/**
* @brief Logistic population growth
*
* @param year
* @param N_o
* @param N_f
* @param k
* @param total_duration
* @return int
*/
static int logistic_population_func(int year, int N_o, int N_f, int k, int total_duration) {
// https://en.wikipedia.org//wiki/Logistic_function
return N_o + (N_f - N_o) /
(1 + exp(-k * (year - total_duration/2)));
}