varianceif() (aggregation function)

Calculates the variance of Expr across the group for which Predicate evaluates to true.

• Can be used only in context of aggregation inside summarize

Syntax

varianceif (Expr, Predicate)

Arguments

• Expr: Expression that will be used for aggregation calculation.
• Predicate: predicate that if true, the Expr calculated value will be added to the variance.

Returns

The variance value of Expr across the group where Predicate evaluates to true.

Examples

range x from 1 to 100 step 1
| summarize varianceif(x, x%2 == 0)