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wzu-machine-learning-course's Issues

02 机器学习-回归 20页公式

方差的计算公式应该是$\frac{1}{m} \sum_{i=1}^{m}\left(x^{(i)}-u\right)^{2}$

而非$\frac{1}{m} \sum_{i=1}^{m}\left(x^{(i)}\right)^{2}$

PPT 线性代数回顾存在一处错误

5.矩阵的特征值和特征向量
1.矩阵的特征值和特征向量的概念及性质
从而|𝐴| ≠ 0 ⇔ 𝐴没有特征值。
此处不对,可举反例,如矩阵E等。
Screenshot_2022-11-05-09-31-34-365-edit_cn wps moffice_eng

04 机器学习 贝叶斯代码实现没有P(Y=C)

04 机器学习 贝叶斯代码实现没有P(Y=C)
probabilities = {}
for label, value in self.model.items():
probabilities[label] = 1
for i in range(len(value)):
mean, stdev = value[i]
probabilities[label] *= self.gaussian_probability(
input_data[i], mean, stdev)
return probabilities

没有实现P(Y=C)

公式中不是要计算p(y)p(x|y)吗?
是不是少乘一个p(y)

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