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homemade-machine-learning-cn

homemade-machine-learning

本项目包含了用 Python 实现流行的机器学习算法例子和他们背后的数学原理说明。每个例子包含交互的 Jupyter Notebook demo,你可以操作训练数据,算法配置,并且可以在你的播放器内立即看到结果、图表和预测值。本项目的大部分例子都基于吴恩达的《机器学习课程》。

本项目的目的不在于使用第三方库仅用几行完成机器学习算法,而是从零开始,使用算法背后的数学进行编写。这也是为什么所有算法实现都被称为“自制”,而不是为了产品应用。

有监督学习 Supervised Learning

在有监督学习中,我们有一个训练数据集合作为输入,每个训练集合有一个标签或“真值”集合作为输出。然后,我们训练模型(机器学习算法参数)正确地映射(正确预测)输入和输出。最终目的是找到一组模型参数,可以成功的把新数据的输入映射(预测)到输出。

回归 Regression

我们在回归问题中进行真实值预测。一般我们试图在训练数据中绘制线/平面/n维平面。

用途举例:股价预测,销售分析,任意数字的依赖度等。

🤖 线性回归 Linear Regression

  • [数学 | 线性回归]
  • [代码 | 线性回归]
  • [数学 | 线性回归]

神经网络 Neural Network (NN)

神经网络本身不是一个算法,而是一个框架,很多不同机器学习算法一起工作,处理复杂的输入。

用途举例:所有其他算法的替代算法,图像视频,语音识别,图像处理(应用特殊形式),翻译等。

多层感知 Multilayer Perceptron (MLP)

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