CovarianceN (MDX)
Returns the sample covariance of x-y pairs of values evaluated over a set, by using the unbiased population formula (dividing by the number of x-y pairs).
Syntax
CovarianceN(Set_Expression, Numeric_Expression_y [ ,Numeric_Expression_x ] )
Arguments
Set_Expression
A valid Multidimensional Expressions (MDX) expression that returns a set.Numeric_Expression_y
A valid numeric expression that is typically a Multidimensional Expressions (MDX) expression of cell coordinates that return a number that represents values for the y-axis.Numeric_Expression_x
A valid numeric expression that is typically a Multidimensional Expressions (MDX) expression of cell coordinates that return a number that represents values for the x-axis.
Remarks
The CovarianceN function evaluates the specified set against the first numeric expression, to get the values for the y-axis. The function then evaluates the specified set against the second numeric expression, if specified, to get the set of values for the x-axis. If the second numeric expression is not specified, the function uses the current context of the cells in the specified set as values for the x-axis.
The CovarianceN function uses the unbiased population formula. This is in contrast to the Covariance function that uses the biased population formula (dividing by the number of x-y pairs).
Note
The CovarianceN function ignores empty cells or cells that contain text or logical values. However, the function includes cells with values of zero.