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	tdownhill_simplex.h - numeric - C++ library with numerical algorithms
	git clone git://src.adamsgaard.dk/numeric
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	tdownhill_simplex.h (1099B)
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	1 #ifndef DOWNHILL_SIMPLEX_H_
	2 #define DOWNHILL_SIMPLEX_H_
	3
	4 #include <functional>
	5 #include <vector>
	6 #include <armadillo>
	7 using namespace std;
	8 using namespace arma;
	9
	10 class amoeba {
	11
	12 public:
	13
	14 // Constructor
	15 amoeba(function<double(vec)> fun, vector<vec> simplex);
	16
	17 // Return lowest simplex position
	18 vec low();
	19
	20 // Move amoeba downhill with relevant method
	21 void downhill(double simplex_size_goal);
	22
	23 // Move amoeba downhill with relevant method, modified method
	24 void downhill_mod(double simplex_size_goal);
	25
	26 private:
	27
	28 // Number of vertexes
	29 int d;
	30
	31 // Maxima points of function
	32 int hi, lo;
	33
	34 // Vertex points
	35 vector<vec> p;
	36
	37 // Functions to be evaluated
	38 std::function<double(vec)> f;
	39
	40 // Function values at points
	41 vec value;
	42
	43 // Centroid
	44 vec p_ce;
	45
	46 // Centroid from previous step
	47 vec p_ce_o;
	48
	49 // Filename of output file
	50
	51 // Private class functions
	52 void update();
	53
	54 // Returns size of the amoeba
	55 double size();
	56
	57 // Write amoeba position vertexes to stderr
	58 void pos();
	59 };
	60
	61 #endif