% 用解方程的方法求交点坐标...p1 = ployfit(x1,y1,2);f1 = polt2str(p1,'x');p2 = polyfit(x2,y2,2);f2 = poly2str(p2,'x');[x,y] = solve(f1,f2,'x','y');
拟合出两个曲线方程后求交点，可用solve命令求出交点坐标
