一维边值为0的微分方程，有限元方法逼近问题的解，给出误差的lebesgue模估计和能量估计。copy到命令窗口里运行即可。-solove one dimension ODE in FEM,and give error estimate

演示一维有限元方法程序。并附有L2误差收敛阶数随着网格变细的误差图形-Presentation of one-dimensional finite element method program. Together with L2 error convergence order fining error with grid graphics