这两个程序是MATLAB的M矩阵法，P矩阵法，其它的为测试文件。-M matrix method, the P-matrix method

roots -Polynomial roots Syntax r = roots(c) Descr iption r = roots(c) returns a column vector whose elements are the roots of the polynomial c. Row vector c contains the coefficients of a polynomial, ordered in descending powers. If c has n