来自 cvxpy 的 quad_form() 抛出 IndexError答案

【问题标题】：quad_form() from cvxpy is throwing IndexError来自 cvxpy 的 quad_form() 抛出 IndexError
【发布时间】：2018-06-13 15:19:31
【问题描述】：

我正在尝试从 Python Robotics github 存储库运行此 code。但我收到以下错误。

model_predictive_speed_and_steer_control.py 

start!!

Traceback (most recent call last):
  File "model_predictive_speed_and_steer_control.py", line 543, in <module>
    main()
  File "model_predictive_speed_and_steer_control.py", line 520, in main
    t, x, y, yaw, v, d, a = do_simulation(cx, cy, cyaw, ck, sp, dl)
  File "model_predictive_speed_and_steer_control.py", line 403, in do_simulation
    xref, x0, dref, oa, odelta)
  File "model_predictive_speed_and_steer_control.py", line 235, in iterative_linear_mpc_control
    oa, od, ox, oy, oyaw, ov = linear_mpc_control(xref, xbar, x0, dref)
  File "model_predictive_speed_and_steer_control.py", line 262, in linear_mpc_control
    cost += cvxpy.quad_form(u[:, t], R)
  File "/usr/local/lib/python2.7/dist-packages/cvxpy/expressions/expression.py", line 315, in __getitem__
    return cvxtypes.index()(self, key)
  File "/usr/local/lib/python2.7/dist-packages/cvxpy/atoms/affine/index.py", line 48, in __init__
    self.key = ku.validate_key(key, expr.shape)
  File "/usr/local/lib/python2.7/dist-packages/cvxpy/utilities/key_utils.py", line 49, in validate_key
    raise IndexError("Too many indices for expression.")  
IndexError: Too many indices for expression.

我也更新了“cvxpy”模块。

【问题讨论】：

标签： cvxpy

【解决方案1】：

看起来 Python 代码适用于 CVXPY 的旧版本（1.0 之前）。您可以找到更改的内容here。

我建议你要么

将 CVXPT 降级到早期版本 (0.4.x)
使用this script升级1.0版本的python文件。

【讨论】：