Errors while solving an inverted matrix in Matlab

[jen0leb]

Hey,
i've been trying to find a better fit for a correlation, the numbers I'm dealing with are really small and when i try to solve for the coefficients using the inverse function on the matrices in Matlab i get this error:

Warning: Matrix is close to singular or badly scaled. Results
may be inaccurate. RCOND = 5.541639e-25.

I tried solving the inverted matrix in excel and the results didn't make much sense either! is there an other way to solve this problem? I really can't solve it by hand it'll take me ages.

i'm open to any suggestion...

J.

 

[Stephen Tashi]

is there an other way to solve this problem?

You might have better luck if you stated the problem you are trying to solve rather than making the problem "How do I numerically invert a nearly singular matrix?".

If the problem is going to be "How do I numerically invert a nearly singular matrix?" then this link might help.http://www.mathworks.com/matlabcentral/newsreader/view_thread/157000 It suggests using a pseudo-inverse instead of an inverse.