Computes the interquartile range (iqr) for an array of values.
$ npm install compute-iqr
For use in the browser, use browserify.
To use the module,
var iqr = require( 'compute-iqr' );
Computes the interquartile range provided an input array
.
var unsorted = [ 8, 2, 3, 9, 5, 1, 4, 10, 7, 0, 6 ];
var r = iqr( unsorted );
// returns 6
If the input array
is already sorted
in ascending order, set the sorted
flag to true
.
var sorted = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ];
var r = iqr( sorted, {'sorted': true} );
// returns 6
Additional options are the same as for the quantile module.
var data = new Array( 100 );
for ( var i = 0; i < data.length; i++ ) {
data[ i ] = Math.round( Math.random()*100 );
}
console.log( iqr( data ) );
To run the example code from the top-level application directory,
$ node ./examples/index.js
If the input array
is not sorted in ascending order, the function is O( N log( N ) )
. If the input array
is sorted, the function is O(1)
.
Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:
$ make test
All new feature development should have corresponding unit tests to validate correct functionality.
This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:
$ make test-cov
Istanbul creates a ./reports/coverage
directory. To access an HTML version of the report,
$ make view-cov
Copyright © 2014. Athan Reines.