一个一元曲线多项式数值演示例子，用于各种数据统计分析。-a one yuan polynomial curve Numerical examples demonstrate, for the statistical analysis of data.

勒让德多项式德生成，在matlab 中德勒让德多项式不能直接用于求导数等计算，故可以自己定义-Legendre polynomials Germany generation, Dragulescu in Matlab which allow polynomials not be directly used for such derivative, it can own definition

高次方程求解的c代码实现，用于数值分析课，简单实用，可作为参考-Lagrange interpolating polynomial,Bisection algorithm,Newton’s method and Secant method