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algebra
means completeness and balancing, from the Arabic word Ø§Ù„Ø¬Ø¨Ø± 
mnjs
MATH NODE JS (MNJS): A tiny math library for node.js & JavaScript on browser
Build stunning web applications quickly using Syncfusion JavaScript UI controls.
* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.
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README
Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of builtin functions and constants, and offers an integrated solution to work with different data types like numbers, big numbers, complex numbers, fractions, units, and matrices. Powerful and easy to use.
Features
 Supports numbers, big numbers, complex numbers, fractions, units, strings, arrays, and matrices.
 Is compatible with JavaScript's builtin Math library.
 Contains a flexible expression parser.
 Does symbolic computation.
 Comes with a large set of builtin functions and constants.
 Can be used as a command line application as well.
 Runs on any JavaScript engine.
 Is easily extensible.
 Open source.
Usage
Math.js can be used in both node.js and in the browser.
Install math.js using npm:
npm install mathjs
Or download mathjs via one of the CDN's listed on the downloads page:
https://mathjs.org/download.html
Math.js can be used similar to JavaScript's builtin Math library. Besides that, math.js can evaluate expressions and supports chained operations.
import {
atan2, chain, derivative, e, evaluate, log, pi, pow, round, sqrt
} from 'mathjs'
// functions and constants
round(e, 3) // 2.718
atan2(3, 3) / pi // 0.75
log(10000, 10) // 4
sqrt(4) // 2i
pow([[1, 2], [3, 1]], 2) // [[7, 0], [0, 7]]
derivative('x^2 + x', 'x') // 2 * x + 1
// expressions
evaluate('12 / (2.3 + 0.7)') // 4
evaluate('12.7 cm to inch') // 5 inch
evaluate('sin(45 deg) ^ 2') // 0.5
evaluate('9 / 3 + 2i') // 3 + 2i
evaluate('det([1, 2; 3, 1])') // 7
// chaining
chain(3)
.add(4)
.multiply(2)
.done() // 14
See the Getting Started for a more detailed tutorial.
Browser support
Math.js works on any ES5 compatible JavaScript engine: node.js, Chrome, Firefox, Safari, Edge, and IE11.
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 ESM output, CommonJS output, and the bundle math.js from the source files and put them in the folder lib.
Develop
When developing new features for mathjs, it is good to be aware of the following background information.
Code
The code of mathjs
is written in ES modules, and requires all files to have a real, relative path, meaning the files must have a *.js
extension. Please configure adding file extensions on auto import in your IDE.
Architecture
What mathjs tries to achieve is to offer an environment where you can do calculations with mixed data types,
like multiplying a regular number
with a Complex
number or a BigNumber
, and work with all of those in matrices.
Mathjs also allows to add a new data type, like say BigInt
, with little effort.
The solution that mathjs uses has two main ingredients:
Typed functions. All functions are created using
typedfunction
. This makes it easier to (dynamically) create and extend a single function with new data types, automatically do type conversions on function inputs, etc. So, if you create function multiply for twonumber
s, you can extend it with support for multiplying twoBigInts
. If you define a conversion fromBigInt
tonumber
, the typedfunction will automatically allow you to multiply aBigInt
with anumber
.Dependency injection. When we have a function
multiply
with support forBigInt
, thanks to the dependency injection, other functions usingmultiply
under the hood, likeprod
, will automatically supportBigInt
too. This also works the other way around: if you don't need the heavyweightmultiply
(which supports BigNumbers, matrices, etc), and you just need a plain and simple number support, you can use a lightweight implementation ofmultiply
just for numbers, and inject that inprod
and other functions.
At the lowest level, mathjs has immutable factory functions which create immutable functions. The core function math.create(...)
creates a new instance having functions created from all passed factory functions. A mathjs instance is a collection of created functions. It contains a function like math.import
to allow extending the instance with new functions, which can then be used in the expression parser.
Build scripts
The build script currently generates two types of output:
 any, generate entry points to create full versions of all functions
 number: generating and entry points to create lightweight functions just supporting
number
For each function, an object is generated containing the factory functions of all dependencies of the function. This allows to just load a specific set of functions, and not load or bundle any other functionality. So for example, to just create function add
you can do math.create(addDependencies)
.
Test
To execute tests for the library, install the project dependencies once:
npm install
Then, the tests can be executed:
npm test
Additionally, the tests can be run on FireFox using headless mode:
npm run test:browser
To run the tests remotely on BrowserStack, first set the environment variables BROWSER_STACK_USERNAME
and BROWSER_STACK_ACCESS_KEY
with your username and access key and then execute:
npm run test:browserstack
To test code coverage of the tests:
npm run coverage
To see the coverage results, open the generated report in your browser:
./coverage/lcovreport/index.html
Continuous integration testing
Continuous integration tests are run on Github Actions and BrowserStack every time a commit is pushed to github. Github Actions runs the tests for different versions of node.js, and BrowserStack runs the tests on all major browsers.
Thanks Github Actions and BrowserStack for the generous free hosting of this open source project!
License
Copyright (C) 20132021 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
https://www.apache.org/licenses/LICENSE2.0
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.
*Note that all licence references and agreements mentioned in the mathjs README section above
are relevant to that project's source code only.