中文说明：尽管matlab提供了朴素bayes的函数，但要理解朴素bayes还是自己编程实现为好。这是以IRIS数据集为例，用朴素bayes方法分类的程序。
English Description：
Although matlab provides naive Bayes function, it is better to understand naive Bayes by programming. This is a simple Bayes classification program based on iris dataset.