This allows you to add regression lines to any series. Supports: linear, polynomial, logarithmic, exponential and loess. Calculates the r-value
npm install highcharts-regressionHighcharts Regression
=====================
Linear and non-linear regression support for highcharts.
Allows you to add regression series to any existing series on your chart.
Calculates the r-squared value (coefficient of determination) and optionally prints it on the legend.
If Linear or Polynomial regression is selected, you can print the equation on the legend.
For a basic usage just add this property to the series json
regression: true
And for advanced configuration you can add options to
regressionSettings: {}
##### type (String)
Regression type: 'linear' ,'exponential', 'polynomial', 'power', 'logarithmic', 'loess'. Default: linear
##### order (Int)
Set the order (polynomial only). Default: 2
##### name (String)
The name as it appears in the legend and tooltip. Use the following replacements:
* %r: Value of [correlation coefficient][wiki-r]
* %r2: Value of [coefficient of determination][wiki-r2]
* %eq: Regression equation
* %se: Standard error
Default: Equation: %eq
##### decimalPlaces (Int)
Set the number of decimal places for r and r2 (linear only). Default: 2
##### lineType (String)
??. Default: spline
##### lineWidth (Int)
The width of the regression line. Default: 2
##### dashStyle (String)
Use one of Highcharts-recognized dash styles. Default: solid
##### color (String)
Use one of Highcharts-recognized color definitions. Default: none.
##### useAllSeries (Boolean)
??. Default: false
##### extrapolate (Int)
??. Default: 0
##### loessSmooth (Int)
??. Default: 25
##### visible (Boolean)
Whether to show the line itself. Hiding the line will grey out its legend item. Default: true
##### hideInLegend (Boolean)
The opposite of visible: show the line but not its legend item. Default: false
##### index (Int)
The index of the series in the chart, affecting the internal index in the chart.series array, the visible Z index as well as the order in the legend. Default: undefined
##### legendIndex (Int)
The sequential index of the series in the legend. Default: undefined
##### tooltip (Object)
Stardard Highcharts tooltip object
##### dataLabels (Array of objects)
Show dataLabels on specified points. Choose which points should have labels and enter their format. Supports Highchart dataLabel.format and the regression variables stated for name. Default: undefined
Format expected for dataLabel objects:
```
{
pointIndex: number // Index of the point to add label to.
format: string // The text/format for the label.
}
##### regressionSeriesOptions (Object)undefined
Standard Highcharts series object.
Customize the options for the generated regression series. Default:
* equation (Array[Int]) individual parts of the regression equation
* points (Array)
* rValue (Int) [correlation coefficient][wiki-r]
* rSquared (Int) [coefficient of determination][wiki-r2]
* standardError (Int)
* string` (String) the resulting formula in string format
[wiki-r]: https://en.wikipedia.org/wiki/Correlation_coefficient
[wiki-r2]: https://en.wikipedia.org/wiki/Coefficient_of_determination