均值和最小二乘法
摘要:有一维数组 [x1,x2...xn],要求一个值X,使得: F(X) = (X-x1)2+(X-x2)2+...(X-xn)2 = min F(X) = nX2 - 2 * (x1+x2+....+xn) + x12 + x22 + ...+xn2 = min 对X求导,当dF/dX = 0时,F(
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posted @ 2019-08-15 18:56
posted @ 2019-08-15 18:56