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Udacity project linear_algebra

机器学习入门-线性代数基础


运行测试代码: %run -i -e test.py LinearRegressionTestCase.test_... Ctrl + Enter 运行即可。

如果实现有问题,会有断言错误AssertionError被抛出。

以下是一些带有特定反馈的断言错误说明:

  • AssertionError: Matrix A shouldn't be modified
    • 在实现augmentMatrix时修改了矩阵A
  • AssertionError: Matrix A is singular
    • gj_Solve实现在矩阵A是奇异矩阵时没有返回None
  • AssertionError: Matrix A is not singular
    • gj_Solve实现会在矩阵A不是奇异矩阵时返回None
  • AssertionError: x have to be two-dimensional Python List
    • gj_Solve返回的数据结构不正确,x必须是二维列表,而且是Nx1的列向量
  • AssertionError: Regression result isn't good enough
    • gj_Solve返回了计算结果,但是偏差过大

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