npm-extrapolate
Extrapolate values from a set of evidence. Synthesize values that are not defined.
Based on AlexanderBrevig/Extrapolate.js code
Installation
npm install extrapolate
Usage
var extrap = require('extrapolate');
//create an object for training
var extrapolate = new extrap();
// for this example, ket's keep it simple
// f(x) = 2x
extrapolate.given(0,0);
extrapolate.given(1,2);
extrapolate.given(2,4);
extrapolate.given(4,8);
extrapolate.given(5,10);
console.log(extrapolate.getLinear(-1)); // -2
console.log(extrapolate.getLinear(0)); // 0
console.log(extrapolate.getLinear(1)); // 2
console.log(extrapolate.getLinear(6)); // 12
//create an object for training
var extrapolatepoly = new extrap();
// f(x) = x^3 + 2x^2 + 5x - 4
extrapolatepoly.given(0,-4);
extrapolatepoly.given(1,0);
extrapolatepoly.given(2,12);
extrapolatepoly.given(-1,-6);
console.log(extrapolatepoly.getPoly(0.5)); // -2.625
console.log(extrapolatepoly.getPoly(3)); // 38