决策树是数据挖掘分类算法的一个重要方法。在各种分类算法中，决策树是最直观的一种。决策树(Decision Tree）是在已知各种情况发生概率的基础上，通过构成决策树来求取净现值的期望值大于等于零的概率。-A decision tree is an important method of data mining classification algorithms. In various classification algorithms, decision trees is the most intuitive one. Decision tree (Decision Tree) is based on the probability of occurrence of each case are known, through the decision tree to constitute greater than the probability of obtaining the expected net present value equal to zero.