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R Squared Function
Math Statistics Class

Public Function RSquared( _
      ByRef vYValues As Variant _
    , ByRef vXValues As Variant _
    ) As Variant

Returns the square of the Pearson product moment correlation coefficient.
The proportion of the variance in Y attributable to the variance in X.

Examples: 
    RSquared(Array(1, 3, 4), Array(2, 6, 9)) = 0.988416988416988
    RSquared(Array(11, 44, 22), Array(15, 23, 12)) = 0.680780559646539
See also: 
    Pearson Function
    Slope Function
    Intercept Function
    StandardError Function
    Correlation Function
    Covariance Function
    RSQ Function (Microsoft Excel)
vYValues: Dependent set of data. Numeric-type array or Variant array containing only numeric elements. This function is NOT affected by the current setting of the StatVarType Property. It assumes that vYValues is an array that contains only numeric elements.
vXValues: Independent set of data. Numeric-type array or Variant array containing only numeric elements. This function assumes that vXValues is an array that contains only numeric elements.
Return value: Function returns the square of the Pearson product moment correlation coefficient. Function returns Null if the arrays vYValues and vXValues contain a different number of elements, if both arrays are empty, or if there is some type of error, such as if the argument is a Variant array which contains an Object reference or String.

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