#pragma once

typedef struct {
	double Ka;
	double Cb;
}linear_ceoff_t;
//#define MAX_SAMPLES 20
typedef struct {
	int max_samples;
	int num_samples;
	//double x[MAX_SAMPLES];
	//double y[MAX_SAMPLES];
	double mul_xx;
	double mul_xy;
	double sum_x;
	double sum_y;
	linear_ceoff_t coeff;
	int finished;
}least_square_t;

void least_square_init(least_square_t *ls, int samples);
void least_square_clear(least_square_t *ls);
int least_square_put(least_square_t *ls, double x, double y);
double get_y_by_x(least_square_t *ls, double x);
int get_x_by_y(least_square_t *ls, double y);