def kalman_filter(z): x_hat = np.zeros((3, 1)) # 初始状态向量 for i in range(len(z)): # 预测 x_hat_minus = np.dot(A, x_hat) P_minus = np.dot(np.dot(A, P), A.T) + Q报错File "G:\project2\KSVD.py", line 36, in <module> x_filt = kalman_filter(x) File "G:\project2\KSVD.py", line 26, in kalman_filter P_minus = np.dot(np.dot(A, P), A.T) + Q UnboundLocalError: local variable 'P' referenced before assignmen
时间: 2023-06-15 17:07:30 浏览: 174
kalman filter.rar_Kalman filter_kalman_returnahx_zipper7t3_卡尔曼 跟
这个错误是因为你在函数中引用了变量 P,但是你没有在函数中定义它。可以在函数开始时定义 P,或者将其作为参数传递给函数。例如:
```
def kalman_filter(z, P):
x_hat = np.zeros((3, 1)) # 初始状态向量
for i in range(len(z)):
# 预测
x_hat_minus = np.dot(A, x_hat)
P_minus = np.dot(np.dot(A, P), A.T) + Q
```
然后在调用函数时传递 P 参数:
```
P = np.eye(3) # 初始协方差矩阵
x_filt = kalman_filter(x, P)
```
阅读全文