一个学习Naive Bayes的matlab代码，学习到的参数只与样本的个数有关，与实际的样本值没有直接关系。

为了代码的可读性、容易学些，算法的实现没有采用MATLAB向量化

操作。-A Naive Bayes learning matlab code, only to learn the parameters related to the number of samples, and the actual sample values ​ ​ are not directly related. For code readability, easy to learn something, no algorithm using MATLAB vectorized operations.