Thank you Tobias. I've seen the explanation, I'm going. Next time
________________________________ De : Tobias Boege <tabo...@gmail.com> Envoyé : mardi 18 avril 2017 09:55 À : mailing list for gambas users Objet : Re: [Gambas-user] Polynomiale Least Square On Tue, 18 Apr 2017, cheikh diabang wrote: > Hello. I would like to write gambas code which determines the polynomial of a > set of x, y coordinates. Is there anyone who has used it to help me please. If your polynomial has real or complex coefficients you can use gb.gsl's [1] Polynomial class. But while the documentation says arithmetic operators are overloaded in gb.gsl, this isn't entirely true for polynomials. In particular multiplication of polynomials is not supported. You have to implement that yourself using the array accessors. Addition and multiplication of polynomials is all you need for Lagrange polynomials [2] which solve your interpolation problem. I have done it before, it's straightforward. Regards, Tobi [1] http://gambaswiki.org/wiki/comp/gb.gsl Gambas Documentation - /comp/gb.gsl - gambaswiki.org<http://gambaswiki.org/wiki/comp/gb.gsl> gambaswiki.org gb.gsl. This component aims at providing most of the features of the Gnu Scientific Library. At the moment, it adds support for complex numbers, vectors, matrices and ... [2] https://en.wikipedia.org/wiki/Lagrange_polynomial Lagrange polynomial - Wikipedia<https://en.wikipedia.org/wiki/Lagrange_polynomial> en.wikipedia.org In numerical analysis, Lagrange polynomials are used for polynomial interpolation. For a given set of distinct points and numbers , the Lagrange polynomial is the ... -- "There's an old saying: Don't change anything... ever!" -- Mr. Monk ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user Gambas-user Info Page - SourceForge<https://lists.sourceforge.net/lists/listinfo/gambas-user> lists.sourceforge.net To see the collection of prior postings to the list, visit the Gambas-user Archives. Using Gambas-user: To post a message to all the list members ... ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
