flow-iqr
Version:
Reduce transform stream which calculates the interquartile range over streamed data.
66 lines (41 loc) • 1.42 kB
Markdown
flow-iqr
========
Reduce transform stream which computes the interquartile over a stream of numeric data.
Note: in order to calculate the interquartile range exactly, all data must be buffered into memory. As a result, this stream acts as a sink. Use caution when applying the transform to large datasets.
``` bash
$ npm install flow-iqr
```
``` javascript
var eventStream = require( 'event-stream' ),
qStream = require( 'flow-iqr' );
// Create some data...
var data = new Array( 1000 );
for ( var i = 0; i < data.length; i++ ) {
data[ i ] = Math.round( Math.random() * 100 );
}
// Create a readable stream:
var readStream = eventStream.readArray( data );
// Create a new stream:
var stream = qStream()
.stream();
// Create a pipeline:
readStream.pipe( stream )
.pipe( eventStream.map( function( d, clbk ) {
clbk( null, d.toString() );
}))
.pipe( process.stdout );
```
Unit tests use the [Mocha](http://visionmedia.github.io/mocha) test framework with [Chai](http://chaijs.com) assertions.
Assuming you have installed Mocha, execute the following command in the top-level application directory to run the tests:
``` bash
$ mocha
```
All new feature development should have corresponding unit tests to validate correct functionality.
[](http://opensource.org/licenses/MIT).
---
Copyright © 2014. Athan Reines.