中文说明：一维有限元程序比较简单，二维有限源程序却很复杂。该程序是解决二维椭圆方程的matlab程序，采用矩形网格。程序完全正确，可以画出精确解和数值解的图像。改程序可以用来解决椭圆方程，也可以作为其他方程的参考程序。稍加改动，既可以解决其他的方程。
English Description：
One-dimensional finite element program is relatively simple, two-dimensional finite source code is quite complex. This program is MATLAB programs for solving two-dimensional elliptic equations, using a rectangular grid. Procedure is absolutely correct, you can draw the image of exact and numerical solutions. Change procedures can be used to solve elliptic equations, also can be used as a reference program. With slight modification, can solve the other equations.