Re: [ANN] ratfun-2.3 Polynomials and Rational Functions
On Sat, Aug 19, 2006 at 11:33:19AM -0500, Raymond L. Buvel wrote: The ratfun module provides classes for defining polynomial and rational function (ratio of two polynomials) objects. These objects can be used in arithmetic expressions and evaluated at a particular point. Home page: http://calcrpnpy.sourceforge.net/ratfun.html Note: If you are using rpncalc-1.2 or later, this module is already included. This release is for folks who don't want rpncalc. Changes in 2.3 * Update the included clnum package. * Improved the formatting of the string representation of a polynomial. * Polynomial and rational function evaluation now works with array inputs. En ayant jeté un oeil rapidement je dirais que ça fait rien de plus que le module de Konrad de scientific python Sinon ce que fait llgeometry necessite de manipuler des polynomes à plusieurs variables ce que ni l'un ni l'autre ne font. enfin, presque car le module de Konrad permet de définir et d'évaluer des polynômes à plusieurs variables. -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html -- Ludovic Aubry LOGILAB, Paris (France). http://www.logilab.com http://www.logilab.fr http://www.logilab.org -- http://mail.python.org/mailman/listinfo/python-list
[ANN] ratfun-2.3 Polynomials and Rational Functions
The ratfun module provides classes for defining polynomial and rational function (ratio of two polynomials) objects. These objects can be used in arithmetic expressions and evaluated at a particular point. Home page: http://calcrpnpy.sourceforge.net/ratfun.html Note: If you are using rpncalc-1.2 or later, this module is already included. This release is for folks who don't want rpncalc. Changes in 2.3 * Update the included clnum package. * Improved the formatting of the string representation of a polynomial. * Polynomial and rational function evaluation now works with array inputs. -- http://mail.python.org/mailman/listinfo/python-list
Re: ratfun-2.3 Polynomials and Rational Functions
Are there any differences between this module and the one already present in numpy? http://www.scipy.org/doc/numpy_api_docs/numpy.lib.polynomial.html Cheers, Bas -- http://mail.python.org/mailman/listinfo/python-list
Re: ratfun-2.3 Polynomials and Rational Functions
Bas wrote: Are there any differences between this module and the one already present in numpy? http://www.scipy.org/doc/numpy_api_docs/numpy.lib.polynomial.html Cheers, Bas Yes, there are quite a few. This module uses a multi-precision library (clnum) to make the calculations more precise. This makes the root finder significantly more precise. There is an example in the user manual that shows the difference in performance between Numeric (essentially the same code as in numpy) and the ratfun root finder on an ill-conditioned polynomial. If you choose to use exact coefficients (integers and rationals) then all calculations except for root finding are exact. Unlike the numpy implementation, arithmetic (+-*/**) uses the standard Python operators instead of requiring you to call functions. Ray -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANN] ratfun-2.3 Polynomials and Rational Functions
I'll be out of the office until approximately August 20th. If you have any questions, please email [EMAIL PROTECTED] -- David Wahler -- http://mail.python.org/mailman/listinfo/python-list
