Returns the variance of the entire population.
|table||Any DAX expression that returns a table of data.|
|expression||Any DAX expression that returns a single scalar value, where the expression is to be evaluated multiple times (for each row/context).|
A number with the variance of the entire population.
VARX.P evaluates <expression> for each row of <table> and returns the variance of <expression> assuming that <table> refers to the entire population.. If <table> represents a sample of the population, then compute the variance by using VARX.S.
VARX.P uses the following formula:
∑(x - x̃)2/n
where x̃ is the average value of x for the entire population
and n is the population size
Blank rows are filtered out from columnName and not considered in the calculations.
An error is returned if columnName contains less than 2 non-blank rows
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.
The following example shows the formula for a calculated column that calculates the variance of the unit price per product, when the formula is used in the Product table
= VARX.P(InternetSales_USD, InternetSales_USD[UnitPrice_USD] –(InternetSales_USD[DiscountAmount_USD]/InternetSales_USD[OrderQuantity]))