syms x yf=y/(x^2+y^2+1)-sin(x+cos(y))ezplot(f,[-2 2],[-2 2])h=get(gca,'Children');x=get(h,'xdata');y=get(h,'ydata');c=x.^2+y^2;%解離原點距離n=find(c==min(c));%找最短x(n)%結(jié)果y(n)