此例程为配套书籍的第六章例题6-9的相对应代码，功能为方波信号离散小波变换，编程环境为matlab。-This routine supporting books Chapter Example 6-9 corresponding to the code for the function square wave signal discrete wavelet transform, programming environment Matlab.

MATLAB2维小波变换经典程序 此示意程序用DWT实现二维小波变换-MATLAB2 dimensional wavelet transform classic program this indicated the procedure using DWT realization of two-dimensional wavelet transform