问题描述
我正在使用trust-constr
优化器来最小化该功能:
gen_result = minimize(gen_loss,gen_weights,method = 'trust-constr',bounds = bounds_gen_weights)
并继续收到以下警告:
UserWarning: delta_grad == 0.0. Check if the approximated function is linear. If the function is linear better results can be obtained by defining the Hessian as zero instead of using quasi-Newton approximations.
如果我定义hess = np.zeros( (len(gen_weights),len(gen_weights)) )
并将其添加到这样的代码中:
gen_result = minimize(gen_loss,bounds = bounds_gen_weights,hess = hess)
然后我不断收到此错误消息:
ValueError: `hess` must be either callable,HessianUpdateStrategy or one of ('2-point','3-point','cs').
有什么想法吗?
解决方法
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