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Errors while solving an inverted matrix in Matlab

  1. Mar 16, 2012 #1
    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.
     
  2. jcsd
  3. Mar 21, 2012 #2

    Stephen Tashi

    User Avatar
    Science Advisor

    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.
     
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