matlab画圆,圆上显示的数字随着变量的变化而变化。是用saveas函数吗...答:theta=[linspace(0,2*pi,200),2*pi];xx=cos(theta);yy=sin(theta);numindex=randperm(7);plot(2*r*xx,2*r*yy); %外圆 hold on plot(r*xx,r*yy,'--'); %虚线圆 plot(r*xx/3,r*yy/3); %原点的小圆 text(0,0,num2str(numindex(1)),'HorizontalAlignment','center','...