Equations

Equations is a mathjs extension for working with a collection of named expressions. Optimized for computation performance, the Equations class computes derivatives quickly and lets you compile() a Javascript function that evaluates all of the expressions for a given scope.

Usage

Create a Javscript line() function that evaluates and updates a scope object:

var eq = new Equations();
eq.set("y", "slope*x + intercept");
var line = eq.compile();
var scope = {
    x:2, 
    slope:3, 
    intercept:10
};
line(scope).y.should.equal(16);

Find the derivative expression of y:

eq.derivative("y","x").should.equal("y_dx");
var dy = eq.get("y_dx");
dy.should.equal("slope");