mathjs
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 numbers, big numbers, complex numbers, units, and matrices.
npm install mathjs
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Version | 0.20.0 last updated 8 days ago |
Keywords | math, mathematics, functions, numeric, parser, expression, number, bignumber, complex, matrix, unit |
Repository | git://github.com/josdejong/mathjs.git (git) |
Homepage | http://mathjs.org |
Bugs | https://github.com/josdejong/mathjs/issues |
Dependencies | decimal.js |
Dependents (8) | bip-pod-math, hubot-calculator, jsontest, matrix-3d, noflo-calc, serialtft, thinfilm, web-audio-api |
Starred by | josdejong, jswartwood |
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 numbers, big numbers, complex numbers, units, and matrices. Powerful and easy to use.
Features
- Supports numbers, big 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.
// load math.js and create an instance
var mathjs = require('mathjs'),
math = 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 to 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
cd mathjs
Install the project dependencies:
npm install
Then, the project can be build by executing the build script via npm:
npm run build
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, install the project dependencies once:
npm install
Then, the tests can be executed:
npm test
To test code coverage of the tests:
npm run coverage
To see the coverage results, open the generated report in your browser:
./coverage/lcov-report/index.html
License
Copyright (C) 2013-2014 Jos de Jong wjosdejong@gmail.com
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.