观察最小二乘多项式的数值不稳定现象\fig1.fig ..................................\fig2.fig ..................................\fig3.fig ..................................\fig4.fig ..................................\first.m ..................................\second.m ..................................\third.m ..................................\实验目的.docx ..................................\最小二乘多项式的数值不稳定现象.doc 观察最小二乘多项式的数值不稳定现象