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math.js

http://mathjs.org

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with real and complex numbers, units, and matrices. Powerful and easy to use.

Features

  • Supports numbers, complex numbers, units, strings, arrays, and matrices.
  • Is compatible with JavaScript's built-in Math library.
  • Contains a flexible expression parser.
  • Supports chained operations.
  • Comes with a large set of built-in functions and constants.
  • Has no dependencies. Runs on any JavaScript engine.
  • Can be used as a command line application as well.
  • Is easily extensible.

Usage

Math.js can be installed using npm or bower, or by downloading the library. The library can be used in both node.js and in the browser. See the Getting Started for a more detailed tutorial. To install math.js using npm:

npm install mathjs

Math.js can be used similar to JavaScript's built-in Math library. Besides that, math.js can evaluate expressions and supports chained operations.

// create an instance of math.js
var math = require('mathjs')();

// functions and constants
math.round(math.e, 3);            // 2.718
math.atan2(3, -3) / math.pi;      // 0.75
math.log(1000, 10);               // 3
math.sqrt(-4);                    // 2i
math.pow([[-1, 2], [3, 1]], 2);   // [[7, 0], [0, 7]]

// expressions
math.eval('12 / (2.3 + 0.7)');    // 4
math.eval('5.08 cm in inch');     // 2 inch
math.eval('sin(45 deg) ^ 2');     // 0.5
math.eval('9 / 3 + 2i');          // 3 + 2i
math.eval('det([-1, 2; 3, 1])');  // -7

// chained operations
math.select(3)
    .add(4)
    .multiply(2)
    .done(); // 14

Documentation

Build

First clone the project from github:

git clone git://github.com/josdejong/mathjs.git

The project uses jake as build tool. To be able to run jake from the command line, jake must be installed globally:

sudo npm install -g jake

Then, the project can be build by executing jake in the root of the project:

cd mathjs
jake

This will build the library math.js and math.min.js from the source files and put them in the folder dist.

Test

To execute tests for the library, run:

npm test

License

Copyright (C) 2013 Jos de Jong [email protected]

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.