VARX.S is a DAX function that estimates the variance based on a sample resulting from evaluating an expression for each row in a table.
VARX.S(
Table,
Expression
)| Argument | Properties | Description |
|---|---|---|
| Table | The table containing the rows for which the expression will be evaluated. | |
| Expression | The expression to be evaluated for each row of the table. |
A number that represents the variance of a sample population.
VARX.S evaluates expression for each row of table and returns the variance of expression; on the assumption that table refers to a sample of the population. If table 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.
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]))
Other functions related to VARX.S are:
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