On Sun, May 20, 2012 at 9:53 AM, Andreas Hilboll <[email protected]> wrote:
> > On Sun, May 20, 2012 at 9:37 AM, Charles R Harris > > <[email protected] <mailto:[email protected]>> wrote: > > > > > > > > On Sun, May 20, 2012 at 9:09 AM, Andreas Hilboll <[email protected] > > <mailto:[email protected]>> wrote: > > > > Hi, > > > > I just noticed that there's two polyfit functions, one in > > numpy.lib.polynomial, and one in numpy.polynomial. What's the > > reason for > > this? The calling signatures aren't identical (the > numpy.polynomial > > version supports weights), and I couldn't find a notice on why > two > > versions exist. > > > > > > There are two different polynomial objects, Polynomial and poly1d. > > The Polynomial object is part of a newer group that also contains > > Lengendre, Chebyshev, etc., and doesn't have some of the problems > > that poly1d has. Poly1d is an older implementation. > > I think it would be beneficial for the user if this fact was noted > somewhere in the docstring of the Poly1d implementation. Especially > since numpy.polyfit is pointing to that old implementation. When I saw > the polyfit function in the numpy namespace, I didn't bother checking if > there's anything more sophisticated. > > I could add the appropriate links in the "see also" sections of the > Poly1d docstrings, if you guys agree. > That would be useful. > > > Oh, and the polyfit function in polynomial.polynomial isn't meant to be > > used directly, it is mostly there to support the fit class function of > > Polynomial. See the documentation here < > http://preview.tinyurl.com/8289gfs>. > > Ah, okay. Thanks for that. > > Chuck
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