Solving a system of linear equations with lots of o coefficients.

I have a matrix system of linear equations that look somthing like this were u is a vector of 7 unknowns

I have tried useing linsolve to solve this but My solution is coming out as 0. I am unsue how to fix this.

Thank you for your time and help!

12 8 0 0 0 0 0

-4 12 8 0 0 0 0

0 -4 12 8 0 0 0 (u) =

0 0 -4 12 8 0 0

0 0 0 -4 12 8 0

0 0 0 0 -4 12 8

0 0 0 0 0 -4 12

12

0.7

0.4

1

1.2

1,7

-25

Answer 1

[Bjorn Gustavsson]

Matlab is designed to solve systems of linear equations. It is one of the fundamental operators of its matrix-algebra:

% Your problem is
% u = M*x;
% that has a solution:
x = M\u;
% Check #1:
M*x - u
% Check #2:
[U,S,V] = svd(M);
disp(diag(S))

Since you ask this question this way I deduce that you are reasonably new working with matlab. If that conclusion is close enough to correct, then you might consider browsing through the onramp material, it is an overview-introduction type presentation/course thing that is designed to get you up to speed ASAP. My understanding is that if you go through the parts you find relevant there and then browse/look through the help and documentation on things you'll get up to speed faster than by any other method.

HTH