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计算加速 #218

@xiaowodaweiwang

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@xiaowodaweiwang

老师您好,我想请问下,如何对一个多个循环做优化,例如对下面得Array里头每一列都做优化(因为Array的列有几千列),如何加速?
谢谢老师!

def loss_fun(p, x, y):
a, b, c, d = p
m = x.shape[0]
J = ((1+a * np.exp(-b * (x-c)))/(1-a * np.exp(-b * (x-c))) * d - y) ** 2
J = sum(J)/m
return J

def func(p):
a, b, c, d = p
return loss_fun(p, x, y)

x = np.arange(1, 201)
result = []
for i in range(Array.shape[1]):
y = A[:, i]
ga = GA(func=func, n_dim=4, size_pop=50, max_iter=800, prob_mut=0.001, precision=1e-7)
weight, f = ga.run()
result.append(weight)

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