flow-variance

flow-variance

Reduce transform stream which calculates the sample variance over a stream of numeric data.

Installation

$ npm install flow-variance

Examples

var eventStream = require( 'event-stream' ),
	vStream = require( 'flow-variance' );

// Create some data...
var data = new Array( 1000 );
for ( var i = 0; i < data.length; i++ ) {
	data[ i ] = Math.random();
}

// Create a readable stream:
var readStream = eventStream.readArray( data );

// Create a new variance stream:
var stream = vStream().stream();

// Pipe the data:
readStream.pipe( stream )
	.pipe( eventStream.map( function( d, clbk ){
		clbk( null, d.toString() );
	}))
	.pipe( process.stdout );

Tests

Unit tests use the Mocha test framework with Chai assertions.

Assuming you have installed Mocha, execute the following command in the top-level application directory to run the tests:

$ mocha

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

License

MIT license.

Copyright

Copyright © 2014. Athan Reines.