Re: Problem of polyfit

[Miroslaw Kwasniak]

On Thu, Oct 06, 2005 at 12:53:56PM -0700, Henry F. Mollet wrote:
> octave:36> (yhat-yf)'
> ans =
> 
>  Columns 1 through 5:
> 
>    -3.6364e-05   -3.9394e-05   -4.2424e-05   -4.5455e-05   -4.8485e-05
> 
>  Columns 6 through 10:
> 
>     4.8485e-05    4.5455e-05    4.2424e-05    3.9394e-05    3.6364e-05

Hmm, you have single precision aritmetic?

OCTAVE_VERSION = 2.1.50
   -3.1086e-15    0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00
    0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00    0.0000e+00

OCTAVE_VERSION = 2.9.2
   -8.8818e-16   -4.4409e-15   -7.1054e-15   -3.5527e-15   -1.7764e-15
   -3.5527e-15   -5.3291e-15   -3.5527e-15    0.0000e+00    3.5527e-15



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