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VARIANCE

PDFRSS

Returns the variance from the selected source columns in a new column. Variance is defined as Var(X) = [Sum ((X – mean(X))^2)]/Count(X).

Parameters

• sourceColumns – A JSON-encoded string representing a list of existing columns.

• targetColumn – A name for the newly created column.

Example

{
    "RecipeAction": {
        "Operation": "VARIANCE",
        "Parameters": {
            "sourceColumns": "[\"age\",\"years_in_service\"]",
            "targetColumn": "VARIANCE Column 1"
        }
    }
}