[R] matrix inversion using solve() and matrices containing large/small values

2008-03-05 Thread gerardus vanneste
Hello I've stumbled upon a problem for inversion of a matrix with large values, and I haven't found a solution yet... I wondered if someone could give a hand. (It is about automatic optimisation of a calibration process, which involves the inverse of the information matrix) code:

Re: [R] matrix inversion using solve() and matrices containing large/small values

2008-03-05 Thread Duncan Murdoch
On 3/5/2008 8:21 AM, gerardus vanneste wrote: Hello I've stumbled upon a problem for inversion of a matrix with large values, and I haven't found a solution yet... I wondered if someone could give a hand. (It is about automatic optimisation of a calibration process, which involves the

Re: [R] matrix inversion using solve() and matrices containing large/small values

2008-03-05 Thread Charilaos Skiadas
Sorry, I meant to send this to the whole list. On Mar 5, 2008, at 8:46 AM, Charilaos Skiadas wrote: The problem doesn't necessarily have to do with the range of data. At first level, it has to do with the simple fact that dfdb has rank 6 at most, (7 at most in general, though in your case

Re: [R] matrix inversion using solve() and matrices containing large/small values

2008-03-05 Thread Douglas Bates
On Wed, Mar 5, 2008 at 7:43 AM, Duncan Murdoch [EMAIL PROTECTED] wrote: On 3/5/2008 8:21 AM, gerardus vanneste wrote: Hello I've stumbled upon a problem for inversion of a matrix with large values, and I haven't found a solution yet... Someone with experience in numerical linear