文档中有我们平常用的积分，微分，电磁力，作图的Matlab的理论知识与相关程序。是一个我们必学的文档。-In the document have our usual use of the integral, differential, electromagnetic force, the Matlab mapping the theoretical knowledge and related procedures. Is one we must study the document.

一个简单的MATLAB小程序，赚点积分。-A simple little program MATLAB, earn points.