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regression-trend

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Readme

Regression Trend

Library for creating regression and trend from requested data set.

Supported Regression Types

Linear
Power

Quick Start

Input data looks

Data pattern must looks like { x: point, y: value}

data = [{x:1,y:10},{x:2,y:15}..{x:10,y:50}];

If you want see predictable values use null for value

data = [{x:1,y:10},{x:2,y:15}..{x:10,y:50},{x:11,y:null}];

Predictable value can be everywhere

data = [{x:1,y:10},{x:2,y:null}..{x:10,y:50},{x:11,y:null}];

data = [{x:1,y:null},{x:2,y:null}..{x:10,y:50},{x:11,y:150}];

Try not use zero value for x,y but if you need just do it

Example output data

{ equation: { a: -1, b: 1 },
  points: 
   [ { x: 1, y: 0 },
     { x: 2, y: 1 },
     { x: 3, y: 2 },
     { x: 4, y: 3 },
     { x: 5, y: 4 } ],
  pattern: 'y = -1 + 1 * x' }

Generate regression and trend for requested point

You can use data not in order

var regression = require('regression-trend');
var inputData = [{x:1,y:10},{x:2,y:15},{x:10,y:50}];

var output = regression.generate(inputData);

You can create predictable values for selected points

var value = regression.trend(output.equation,5);

Generate regression for another type

You can create regression for another type default type of regression is linear

List of all types is in

regression.TYPES

Setting other type than default

regression.setType(regression.TYPES.power);