Lines Matching refs:xn
297 double xn = x[i];300 sum_x += xn;301 sum_x2 += xn*xn;302 sum_x3 += xn*xn*xn;303 sum_x4 += xn*xn*xn*xn;306 sum_yx += yn*xn;307 sum_yx2 += yn*xn*xn;
