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温州大学《机器学习》课程资料(代码、课件等)

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print(dict(list(enumerate((i * i for i in range(1, num+1)), start = 1))))

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...

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

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](https://user-images.githubusercontent.com/62001807/200095179-87924fad-9f32-408a-888d-64cdf74613e9.jpg)

应该是对j进行求和 ![微信图片_20240622105009](https://github.com/fengdu78/WZU-machine-learning-course/assets/94724400/ff91cb3e-f7d9-4a4c-a8c0-4681063e1b20)