VARX.S
Applies to: Calculated column Calculated table Measure Visual calculation
Returns the variance of a sample population.
Syntax
VARX.S(<table>, <expression>)
Parameters
Term | Definition |
---|---|
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). |
Return value
A number that represents the variance of a sample population.
Remarks
VARX.S evaluates
expression
for each row oftable
and returns the variance ofexpression
; on the assumption thattable
refers to a sample of the population. Iftable
represents the entire population, then you should compute the variance by using VARX.P.VAR.S uses the following formula:
∑(x - x̃)2/(n-1)
where x̃ is the average value of x for the sample 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.
Example
The following example shows the formula for a calculated column that estimates the variance of the unit price per product for a sample population, when the formula is used in the Product table.
= VARX.S(InternetSales_USD, InternetSales_USD[UnitPrice_USD] – (InternetSales_USD[DiscountAmount_USD]/InternetSales_USD[OrderQuantity]))