坡度下降算法：
importrandomimportnumpyasnpk1=random.random (k2=random.random ) ) k0=random.random ) ) a=0.01x=NP.array ) [ 1416，2 ]，[ 3000，4 ] (t=NP.array ([ 400 ]、[330]、[369]、[232]、[40] ) ) EPS=0.18h=NP.array [0] 1 ) D0=D0 ) h ) I )-t ) I 0 ) D2=D2(h(I )-t(I ) x ) I，1 ) whiled0=EPS ord1=EPS ord2=EPS : k0=k0-a * 1 ) D0=D0 ) h ) I ) t ) I ) D1=D1 ) h ) I ) I，0 k1，k2 ) 0.21288685575373220.102850984378464.69993821419999
importrandomimportnumpyasnptheta0=random.random (theta1=random.random ) theta2=random.random ) a=0.01 x=[ 2400 [0] ) loss=50n=0while loss=EPS andn 10003360 loss=0i=random.randint (0，4 ) h(I )=theta0theta1*x ) I，0 1) 0]theta2=theta2a* ) h[I] 1) loss=loss(h[I]-y[I] ) *2n=n1print(theta0，theta1，theta2) ) ) )