使用决策树进行R语言建模的例子，是模式表达领域的一个例子。(An example of R language modeling using decision tree algorithm)

覆盖了基本常用的机器学习算法。包括线性回归与分类算法；决策树；多种降维算法；优化算法；强化学习等多类算法的Python代码。(It covers the commonly used machine learning algorithms. Including linear regression and classification algorithm; decision tree; a variety of dimensionality reduction algorithm; optimiza