# amath-js

0.1.10 • Public • Published

# amath-js

A simple math library with below features:

• Symbolic computation with support for:
• polynomials and sin/cos
• differentiating with respect to a specific variable
• substituting expressions based on given values
• limited simplifying
• Solve multivariate expressions using Newton-Raphson numerical method.

## Usage

Install the package using

`npm i amath-js`

Then you can use the library as example below:

```// Solving a system of two equations:
// 2x + y = 7
// x * y = 6
import { Sym as S, Solver } from 'amath-js';

let x = new S.Variable("x");
let y = new S.Variable("y");

let exprs = [
new S.Sum(S.cof(2, x), y, new S.Const(-7)),
new S.Sum(new S.Mul(x, y), new S.Const(-6)),
]

console.log("Expressions:");
console.log(exprs.map(e => e.toString()));

let initial = new Map([
[x, 0],
[y, 0],
]);

let solver = new Solver(exprs, initial);
solver.convergeToRMSE(1e-9);

let var_map = solver.var_map();
console.log("Results:")
console.log(var_map);

console.log("Evaluation of expressions:");
solver.exprs.forEach(e => {
console.log(e.toString(), ' = ', e.eval(var_map, false));
})```

There are more examples inside the examples directory. Also you can find documentation for the API in https://amin-not-found.github.io/amath-js.

## Todo

• [ ] Abstract away sin and cos to general function derivation
• [ ] Add other functions
• [ ] Add more sophisticated simplification

## Package Sidebar

### Install

`npm i amath-js`

### Repository

github.com/amin-not-found/amath-js

0

0.1.10

MIT

21.4 kB

9