Package Exports

compute-quantiles

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Readme

Quantiles

Computes quantiles for an array of values.

Installation

$ npm install compute-quantiles

For use in the browser, use browserify.

Usage

To use the module,

var quantiles = require( 'compute-quantiles' );

Examples

var data = new Array( 1000 );

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

console.log( quantiles( data, 10 ) );

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

$ node ./examples/index.js

Notes

This method returns the 0th and 100th quantiles; a.k.a., the min and the max. For example, when computing the median,

var data = new Array( 11 );

for ( var i = 0; i < data.length; i++ ) {
    data[ i ] = i+1;
}

console.log( quantiles( data, 2 ) );
// Returns [1,6,11]

the method returns [1,6,11], where min = 1, max = 11, and median = 6. Accordingly, you should expect the output to be an array with length = n + 1, where n is the number of quantiles.

Tests

Unit

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.

Test Coverage

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,

$ open reports/coverage/lcov-report/index.html

License

MIT license.

compute-quantiles