flow-mmax

Transform stream factory to find sliding-window maximum values (moving max) over a numeric data stream.

Installation

$ npm install flow-mmax

Examples

var eventStream = require('event-stream'),
    maxStream = require('flow-mmax');
 
// Create an array containing random numbers:
var randoms = new Array( 50 );
for (var i = 0; i < randoms.length; i++) {
    randoms[i] = Math.round(Math.random() * 100);
}
 
// Create a readable stream from an array:
var randStream = eventStream.readArray(randoms);
 
// Create a new moving max stream:
var myStream = maxStream()
    .window( 7 )
    .stream();
 
// Pipe the data:
randStream.pipe(myStream)
    .pipe(eventStream.map(function(d,clbk){
        clbk(null,d.toString()+'\n');
    }))
    .pipe(process.stdout);

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

$ node ./examples/index.js

Tests

Unit tests use the Mocha test framework with Chai assertions.

Assuming you have globally 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. Rebekah Smith.