sma

Calculate the simple moving average of an array.

Please consider following this project’s author, Brian Woodward, and consider starring the project to show your :heart: and support.

Install

Install with npm:

$ npm install --save sma

Usage

var sma = require('sma');

API

sma

Calculate the simple moving average of an array. A new array is returned with the average of each range of elements. A range will only be calculated when it contains enough elements to fill the range.

Params

arr {Array}: Array of numbers to calculate.
range {Number}: Size of the window to use to when calculating the average for each range. Defaults to array length.
format {Function}: Custom format function called on each calculated average. Defaults to n.toFixed(2).
returns {Array}: Resulting array of averages.

Example

console.log(sma([1, 2, 3, 4, 5, 6, 7, 8, 9], 4));
//=> [ '2.50', '3.50', '4.50', '5.50', '6.50', '7.50' ]
//=>   │       │       │       │       │       └─(6+7+8+9)/4
//=>   │       │       │       │       └─(5+6+7+8)/4
//=>   │       │       │       └─(4+5+6+7)/4
//=>   │       │       └─(3+4+5+6)/4
//=>   │       └─(2+3+4+5)/4
//=>   └─(1+2+3+4)/4

Attribution

Thanks to @jonschlinkert for simplifying the algorithm. For more moving average modules checkout the related projects below.

About

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new). Please read the [contributing guide](.github/contributing.md) for advice on opening issues, pull requests, and coding standards.

Running Tests

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command: ```sh $ npm install && npm test ```

Building docs

_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_ To generate the readme, run the following command: ```sh $ npm install -g verbose/verb#dev verb-generate-readme && verb ```

You might also be interested in these projects:

exponential-moving-average: Calculate an exponential moving average from an array of numbers.

homepage

Author

Brian Woodward

License

This file was generated by verb-generate-readme, v0.8.0, on September 12, 2018.

sma