[Scipy-tickets] [SciPy] #1250: Refactor scipy.special ortho polynomials to use new numpy.polynomial sub-package

SciPy Trac scipy-tickets@scipy....
Wed Jul 28 22:27:10 CDT 2010


#1250: Refactor scipy.special ortho polynomials to use new numpy.polynomial sub-
package
---------------------------------------------------+------------------------
 Reporter:  dgoldsmith                             |       Owner:  pv   
     Type:  defect                                 |      Status:  new  
 Priority:  normal                                 |   Milestone:  0.9.0
Component:  scipy.special                          |     Version:  0.7.0
 Keywords:  poly1d polynomial orthogonal refactor  |  
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 Presently, the orthogonal polynomial objects and related functions in
 scipy.special are derived from/depend on numpy.poly1d (via orthopoly1d,
 which is located in scipy/special/orthogonal.py).  However, numpy.poly1d
 has poor numerical properties/performance (the conversion to a polynomial
 using roots is slow and inaccurate for high degree and the polynomials
 themselves are numerically ill-conditioned [Charles Harris]) and is slated
 to be replaced--eventually--by appropriate objects/functions in
 numpy.polynomial.  So the scipy dependencies on poly1d need to changed
 accordingly.

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Ticket URL: <http://projects.scipy.org/scipy/ticket/1250>
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