2017 © Pedro Peláez
 

library trend

Analyze data and try to find a significant trend

image

revisor/trend

Analyze data and try to find a significant trend

  • Friday, February 3, 2017
  • by Revisor
  • Repository
  • 2 Watchers
  • 2 Stars
  • 25 Installations
  • PHP
  • 1 Dependents
  • 0 Suggesters
  • 0 Forks
  • 1 Open issues
  • 3 Versions
  • 0 % Grown

The README.md

Trend Calculator

Latest Version on Packagist ![Software License][ico-license] Build Status Quality Score ![Coverage Status][ico-scrutinizer] ![Total Downloads][ico-downloads], (*1)

Analyze data and try to find a significant trend., (*2)

Introduction

Imagine you're looking at points in a graph and you want to draw a single line through the points that represents their change. This is what Trend Calculator does. It tells you if there is a line through the points and how steep it is., (*3)

An example of linear regression, (*4)

This class takes as an input a series of data points in time, performs regression, determines its statistical significance and returns a trend., (*5)

Time is the independent/explanatory variable, values are the dependent/outcome/target variable. In simplest terms:, (*6)

"How does value change in time?", (*7)

Installation

Install Trend Calculator with the PHP package manager, Composer:, (*8)

``` bash composer require revisor/trend, (*9)


## Usage ``` php $trendCalculator = new TrendCalculator(); /** * $data is an array of arrays * In the inner arrays, keys are a time value in any unit (seconds, ie. * timestamp, microseconds, days, weeks...), the values are data values. * Multiple values for one point in time are allowed - maybe two events * occurred at one time. */ $data = [ [1 => 9], [1 => 5], [2 => 12], [4 => 7] ]; /** * The resulting trend is a negative or positive float, or zero. * * Values other than zero mean that there is a significant trend in the provided * data, and the trend goes down (for a negative number) or up (for a positive number). * * If the value is zero, it means that there is no significant trend. */ $trend = $trendCalculator->calculateTrend($data);

The slope of the trend is calculated by mcordingley/Regression. You can access more information about your data by asking the regression itself., (*10)

php $regression = $trendCalculator->getRegression(); var_dump($regression->getStandardErrorCoefficients());, (*11)

Change log

Please see the CHANGELOG for more information what has changed recently., (*12)

Contributing

Please see CONTRIBUTING for details., (*13)

Credits

License

The MIT License (MIT). Please see the License for more information., (*14)

The Versions

03/02 2017

dev-regression-v1

dev-regression-v1 https://github.com/Revisor/trend

Analyze data and try to find a significant trend

  Sources   Download

MIT

The Requires

 

The Development Requires

regression trend correlation significance

11/01 2017

dev-master

9999999-dev https://github.com/Revisor/trend

Analyze data and try to find a significant trend

  Sources   Download

MIT

The Requires

 

The Development Requires

regression trend correlation significance

11/01 2017

0.1.0

0.1.0.0 https://github.com/Revisor/trend

Analyze data and try to find a significant trend

  Sources   Download

MIT

The Requires

 

The Development Requires

regression trend correlation significance