求Smith圆图程序(用MATLAB或VB或VC)答:set(text(Gr(MIN2),x_L_d(1),word),'Rotation',angle,'VerticalAlignment','bottom','HorizontalAlignment','left'); set(text(Gr(MIN2),-x_L_d(1),word),'Rotation',-angle+180,'HorizontalAlignment','right','VerticalAlignment','bottom'); if(mod(X,.2)==0) xval=X^2/(X^2+4); yval...