[SciPy-user] Fitting a polynomial to data

Fernando Perez Fernando.Perez at colorado.edu
Thu Jun 30 16:42:05 CDT 2005


Alan G Isaac wrote:
> On Thu, 30 Jun 2005, Fernando Perez apparently wrote: 
> 
>>p = (XT*X)^-1 * XT * y 
> 
> 
> Which is of course the ordinary least squares solution.
> I note this only because the discussion seemed to
> suggest that something special about polynomials was
> about to be exploited in producing the solution,
> but that something seems only to be the automatic
> production of the data matrix (and not any subsequent
> computations). Correct?

I know, I just mentioned polyfit b/c it encapsulates the construction in a 
single, easy to use routine.  The OP mentioned weak math skills, so I figured 
a single-shot routine might be a good solution for him.

Cheers,

f



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