Covariance (PQL)
                                    Returns the statistical covariance across two lists of numbers.
- Returned Output: Numeric
 - Library: PQL \ Common \ Statistical
 - Version: 2018.00.000
 - Compatibility: 
- It can be combined with other PQL functions throughout the application.
 - It CANNOT be used with MDX or VBA functions. But it can be used on MDX-based content in other parts of the application.
 
 
Syntax
Covariance( <Numeric List> ,  <Numeric List> )
                                    
                                    or
* Click on the function's arguments above for more details on the input values.
Comments
- The two lists of numbers can be typed in as a comma delimited list or inserted via an array.
 
Different Function types
- This function is like the Excel COVAR function - calculating a covariance across a 2 list of items.
 - If you wish to find the covariance for the elements in a specified SET or LIST from a hierarchy, use this semantic function.
 
Examples
This example finds the covariance between 2 sets of numbers derived from columns 0 and 2.
Covariance(dataSetColumn(0), dataSetColumn(2))
Using the grid below, this would return the covariance value of -114.57