Polynomial fitment solver library for node.js
Heavily, heavily inspired by Paul Lutus (lutusp@arachnoid.com) - http://www.arachnoid.com/polysolve This was just a way to node-ize / component-ize this library, and format it a little better.
Copyright © 2023, P. Lutus and Ryan Fink. Released under the GPL https://www.gnu.org/licenses/gpl-3.0.en.html
To get a polynomial function that you can pass an x value into and get the corresponding y value (the parameter is the number of degrees)
var Polyfit = require('polyfit');
var poly = new Polyfit([ 1, 2, 3, 4, 5 ], [ 0.01, 0.03, -0.02, 0.03, 0.02 ]);
var solver = poly.getPolynomial(6);Solver will be a function that you can call with an x value.
console.log(solver(1.17));Computing coefficient terms:
var terms = poly.computeCoefficients(6);Use those terms to get a standard error:
var standardError = poly.standardError(terms);Or to get a correlation coefficient
var cc = poly.correlationCoefficient(terms);(Based on GNU license from Paul Lutus)
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.