MATLAB作为一种广泛应用于科学计算的工具软件，不仅具有强大的数值计算、符号计算、矩阵运算的能力和丰富的绘图功能，还可以像C语言、FORTRAN等计算机高级语言一样进行程序设计，编写扩展名为.m的M文件，实现各种复杂的运算，同时MATLAB自带的许多函数就是M文件函数，用户也可以利用M文件来生成和扩充自己的函数库。-MATLAB as a widely used in scientific computing tools, not only has the great numerical calculation, symbol calculation, matrix computation ability and rich graphics functions, but also can like C language, FORTRAN computer languages such as senior programs to design, write extension called. M m files, realization of different complex operation, at the same time, many of the function is to bring their own MATLAB m documentation function, users can also use m files to generate and expand their function library.