"AttributeError:'list'对象没有属性'ravel'"

Question

我有一个微分方程系统,需要计算雅可比矩阵.下面的代码抛出AttributeError: 'list' object has no attribute 'ravel'.我错过了什么？

import numpy as np
import numdifftools as ndt

def rhs(z, t=0):
    x,y = z

    xdot = (x/5 + y)*(-x**2+1)
    ydot = -x*(-y**2+1)

    return [xdot, ydot]

Jfun = ndt.Jacobian(rhs)

Jfun([1,1])

Answer 1

做就是了:

return np.array([xdot, ydot])

代替.这应该工作......