CLASS 
ErrorPlot EXTENDS 
Plot Class usage and Overview
Concrete class which implements error plots. Error plots takes two y-values for each X-value, min and max. It then marks each pair of min/max values with a vertical bar.   
Class Methods
  
   
function ErrorPlot(&$datay,$datax)
//---------------// CONSTRUCTOR
| Argument | Default | Description | 
|---|
| &$datay |  | Y-data. 2 points for each value | 
| $datax | false | X-data | 
Description
Create a new error plot. Each data value is specified by two y-values, a minimum and maximum value.
The X-vector is optional. 
$errplot = new ErrorPlot($ydata);