自己编写的霍夫曼编码。使用了MATLAB的编程思维，与C或C++的方法不同，不需要建立树结构。很容易理解，而且运算效果丝毫不逊于MATLAB自带的霍夫曼编码函数。-Write your own Huffman coding.Using the MATLAB programming thinking, unlike C or C++ method, do not need to build a tree structure.It is easy to understand, and operati