说明：  Matlab快速统计向量中不同元素的出现次数及概率，弥补了Matlab自带函数在该方面的功能缺陷，统计速度超快，谁用谁知道
(Matlab quick statistics and probability vector is the number of occurrences of different elements make up the Matlab function comes with functional defects in this regard, statistics super-fast, with who knows)