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reverse_logistic.cpp

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+#include <iostream>
+#include <vector>
+#include <cmath>
+#include <iomanip>
+using namespace std;
+
+vector<double> reverse_logistic(vector<double> values, double r, int steps){
+	if (steps == 0){
+		return values;
+	}
+	vector<double> new_values {};
+	for (int i=0; i < values.size(); i++){
+		double current_value = values[i];
+
+		if ((r*r-4*r*current_value) >= 0){
+			double numerator = r + sqrt(r*r - 4*r*current_value);
+			double next_value = numerator / (2*r);
+			if(0 < next_value and 1 > next_value){
+				new_values.push_back(next_value);
+				}
+
+			numerator = r - sqrt(r*r - 4*r*current_value);
+			next_value = numerator / (2*r);
+			if(0 < next_value and 1 > next_value){
+				new_values.push_back(next_value);
+				}
+			}
+
+		}
+	return reverse_logistic(new_values, r, steps-1);
+}
+
+
+int main() {
+	vector<double> values {0.5};
+	double r = 3.9;
+	int steps = 3;
+	vector<double> val = reverse_logistic(values, r, steps);
+	cout << val.size() << endl;
+	for (int i = 0; i < val.size(); i++){
+		cout << std::setprecision (17) << val[i] << ',' << ' ';
+	}
+	return 0;
+}
+
+
+