compute-linfnorm/README.md

Computes the infinity norm (Chebyshev/supremum norm) of an array of values.

linfnorm
===
[![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Coverage Status][coveralls-image]][coveralls-url] [![Dependencies][dependencies-image]][dependencies-url]

> Computes the infinity norm ([Chebyshev/supremum norm](http://en.wikipedia.org/wiki/Norm_(mathematics))) of an array of values.


## Installation

``` bash
$ npm install compute-linfnorm
```

For use in the browser, use [browserify](https://github.com/substack/node-browserify).


## Usage

To use the module,

``` javascript
var linfnorm = require( 'compute-linfnorm' );
```


#### linfnorm( arr )

Computes the maximum norm ([infinity/Chebyshev/supremum/uniform norm](http://en.wikipedia.org/wiki/Norm_(mathematics))) of an `array`.

``` javascript
var data = [ 5, -20, 3, 0, 19 ];

var max = linfnorm( data );
// returns 20
```


## Examples

``` javascript
var linfnorm = require( 'compute-linfnorm' );

var data = new Array( 100 );
for ( var i = 0; i < data.length; i++ ) {
	data[ i ] = Math.random()*100 - 50;
}

console.log( linfnorm( data ) );
```

To run the example code from the top-level application directory,

``` bash
$ node ./examples/index.js
```


## Tests

### Unit

Unit tests use the [Mocha](http://visionmedia.github.io/mocha) test framework with [Chai](http://chaijs.com) assertions. To run the tests, execute the following command in the top-level application directory:

``` bash
$ make test
```

All new feature development should have corresponding unit tests to validate correct functionality.


### Test Coverage

This repository uses [Istanbul](https://github.com/gotwarlost/istanbul) as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

``` bash
$ make test-cov
```

Istanbul creates a `./reports/coverage` directory. To access an HTML version of the report,

``` bash
$ make view-cov
```


## License

[MIT license](http://opensource.org/licenses/MIT). 


---
## Copyright

Copyright &copy; 2014. Athan Reines.


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[npm-url]: https://npmjs.org/package/compute-linfnorm

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[travis-url]: https://travis-ci.org/compute-io/linfnorm

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[dependencies-url]: https://david-dm.org/compute-io/linfnorm

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[dev-dependencies-url]: https://david-dm.org/dev/compute-io/linfnorm

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[github-issues-url]: https://github.com/compute-io/linfnorm/issues