Matlab 方程根 绘图

st=pi/18:pi/90:pi/2;number=size(st,2);xx=zeros(3,number);for current=1:1:number% st=pi/2;st_c=st(current);a=27;b=35;c=250;F=200;bt=0。75*pi-st_c;k=(a*sin(st_c))/((a^2*cos(st_c)^2-a^2+b^2)^0。5);A=[-1,0,k;0,-1,1;a*cos(st_c),a*sin(st_c),0];b=[-F*cos(bt),F*sin(bt),F*c]';% x =sym(A)\sym(b);xx(:,current)=A\b;endplot(st,xx(1,:),'-b',st,xx(2,:),'-r',st,xx(3,:),'-g');legend('xx(1)','xx(2)','xx(3)');单独的图只要分别plot(st,xx(1,:),'-b');plot(st,xx(2,:),'-r');plot(st,xx(3,:),'-g');就行了