此文件里包含了关于Matlab的经典程序，对于Matlab的编程有极大帮助，包括差值拟合等等，另附上一个实时时钟的Matlab程序，也比较经典。-This file contains the classical procedures on Matlab, Matlab programming for the great help, including the difference between the fitting and so on, attached to a real-time clo