中文说明：程序给出了关于线性规划图和等高线图概念的教程。使用的函数[x，fval，exitflag，output，lambda]=linprog（f，A，b，[]，[]，[]，lb）；
English Description：
Program gives tutorial on linear programming plot and the concept of contour plot. The functions used [x,fval,exitflag,output,lambda] = linprog(f,A,b,[],[],lb); linspace meshgrid contour Another file also ellaborate the concept of max-min optimization