最小二乘法2次曲线拟合应用已有的采样时间点，再现这些点所描述的2次曲线的变化，即求出一个二次曲线方程y=ax2+bx+c这个算法的主要问题也就是如何用给定的数据求方程系数abc-Least squares curve fitting application 2 has a sampling time points, reproduce these points 2 are described the change curve, which obtained a quadratic equatio

学习并掌握matlab的最小二乘法，程序设计等操作能够熟练地运用这些命令 能够综合应用matlab所学知识 -To learn and master the Matlab least squares method, program design, operations able to use these commands can be integrated application matlab learned knowledge