How can i solve matrix equations?

 X =  1.0e+07 * [ 3.4829    0.5180    1.0634;
    0.5180    0.4133    0.2245;
    1.0634    0.2245    0.5671];
 Y = [-518.8958  212.9430  219.8578;
  212.9430   93.0098  144.7626;
  219.8578  144.7626  212.9430];
 Z = [ 0.2586    0.0393    0.0763;
    0.0393    0.0327    0.0185;
    0.0763    0.0185    0.0430];
  Cy = 2.75; Vy = 0.0021; Vxy = -0.0017; Tx = 2.51; Txy = -0.0017; Vx =3.21;

 %I have to solve six unknown quantities i.e  "Cx, Cxy,Vx, Ty, Vy, Vxy" I have to solve this equation,

 [Cx;Cy;Cxy;Vx;Vy;Vxy] = [X,Y;Y,Z]*[Tx;Ty;Txy;Vx;Vy;Vxy];
 %[6*1] = [6*6]*[6*1] Matrix size
 %I want to calculate unknown quantities. Is it possible to calculate using MATLAB?

Answer 1

[Torsten]

Supply

F=[X,Y;Y,Z]*[Tx;x(1);Txy;x(2);x(3);x(4)]-[x(5);Cy;x(6);x(2);x(3);x(4)]

for MATLAB's "lsqnonlin" if e.g. Cx, Cxy, Vx, Ty, Vy, Vxy are unknown.

Or reorder your equations such that it reads A*x=b with b known and x unknown and solve for x using x=A\b.

Best wishes

Torsten.