Time-based rolling average calculations for node.js
$npm install --save troll-avg
var Troll=;// Setup 5 counting slots collecting updates for 1 second each// for three different keys. This will give the average values// over the last 5 seconds.var ravg='foo''bar''bletch' 1 5;// Increment a random key by 1 every 250 mS;// Show all averages every second;
Constructor (allowedKeys, period, binCount)
The constructor expects three arguments.
- An array of the keys that are being averaged.
- How many seconds the data for each key is collected into one bins.
- How many bins that the average is calculated over.
Add then cnt value into the current bin. If cnt is not specified it defaults to 1.
Return the rolling average value for the specified key.
Return the rolling average values for all keys as an object.
Since the collection of the values for the current time period is made into a separate set of bins calling .average() or .averages() before the first time period have elapsed the returned average(s) will be zero(s).
Unit tests are done with mocha/chai. They can be run with
Released under the MIT License
Copyright (c) 2014 Mats Engstrom - SmallRoomLabs
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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