Matlab 方程根 绘图st=pi/2;a=27;b=35;c=250;F=200;bt=0.75*pi-st;k=(a*sin(st))/((a^2*cos(st)^2-a^2+b^2)^0.5);A=[-1,0,k;0,-1,1;a*cos(st),a*sin(st),0];b=[-F*cos(bt),F*sin(bt),F*c]';x=sym(A)\sym(b)xx=A\b;要求 st=pi/2:pi/90:pi/18;时候 分别
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![Matlab 方程根 绘图st=pi/2;a=27;b=35;c=250;F=200;bt=0.75*pi-st;k=(a*sin(st))/((a^2*cos(st)^2-a^2+b^2)^0.5);A=[-1,0,k;0,-1,1;a*cos(st),a*sin(st),0];b=[-F*cos(bt),F*sin(bt),F*c]';x=sym(A)\sym(b)xx=A\b;要求 st=pi/2:pi/90:pi/18;时候 分别](/uploads/image/z/2693881-1-1.jpg?t=Matlab+%E6%96%B9%E7%A8%8B%E6%A0%B9+%E7%BB%98%E5%9B%BEst%3Dpi%2F2%3Ba%3D27%3Bb%3D35%3Bc%3D250%3BF%3D200%3Bbt%3D0.75%2Api-st%3Bk%3D%28a%2Asin%28st%29%29%2F%28%28a%5E2%2Acos%28st%29%5E2-a%5E2%2Bb%5E2%29%5E0.5%29%3BA%3D%5B-1%2C0%2Ck%3B0%2C-1%2C1%3Ba%2Acos%28st%29%2Ca%2Asin%28st%29%2C0%5D%3Bb%3D%5B-F%2Acos%28bt%29%2CF%2Asin%28bt%29%2CF%2Ac%5D%27%3Bx%3Dsym%28A%29%5Csym%28b%29xx%3DA%5Cb%3B%E8%A6%81%E6%B1%82+st%3Dpi%2F2%EF%BC%9Api%2F90%EF%BC%9Api%2F18%EF%BC%9B%E6%97%B6%E5%80%99+%E5%88%86%E5%88%AB)
Matlab 方程根 绘图st=pi/2;a=27;b=35;c=250;F=200;bt=0.75*pi-st;k=(a*sin(st))/((a^2*cos(st)^2-a^2+b^2)^0.5);A=[-1,0,k;0,-1,1;a*cos(st),a*sin(st),0];b=[-F*cos(bt),F*sin(bt),F*c]';x=sym(A)\sym(b)xx=A\b;要求 st=pi/2:pi/90:pi/18;时候 分别
Matlab 方程根 绘图
st=pi/2;
a=27;
b=35;
c=250;
F=200;
bt=0.75*pi-st;
k=(a*sin(st))/((a^2*cos(st)^2-a^2+b^2)^0.5);
A=[-1,0,k;0,-1,1;a*cos(st),a*sin(st),0];
b=[-F*cos(bt),F*sin(bt),F*c]';
x=sym(A)\sym(b)
xx=A\b;
要求 st=pi/2:pi/90:pi/18;时候
分别得到st与xx(1),xx(2),xx(3),的图,st为横坐标,
单独的图标和三条曲线在一起的图标都要得到,
也就是求方程Ax=b的解,求xx(1),xx(2),xx(3)和st的关系图
Matlab 方程根 绘图st=pi/2;a=27;b=35;c=250;F=200;bt=0.75*pi-st;k=(a*sin(st))/((a^2*cos(st)^2-a^2+b^2)^0.5);A=[-1,0,k;0,-1,1;a*cos(st),a*sin(st),0];b=[-F*cos(bt),F*sin(bt),F*c]';x=sym(A)\sym(b)xx=A\b;要求 st=pi/2:pi/90:pi/18;时候 分别
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;
end
plot(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