variance function in the Factory
The variance function returns the variance of the column, evaluated within groups defined by the group parameter if required.
The variance is a measure of dispersion, which displays how a set of values is far from their average value.
The variance function is also available by:
Dragging the attribute in the Apply area of the Data Manager’s query panel.
Selecting it in the Sheets tab of the Data Manager.
Function and parameters Parameter Description column It identifies the column to which you want to apply the formula. The column parameter is mandatory. group It allows you to group the results by a certain column. Example The following example uses the Bike sales dataset. Description Screenshot In the example here, we want to retrieve the variance of the Profit attribute. We add a new attribute and write the following formula: The variance for the Profit attribute is 206013.811 If we want to have a more specific analysis, we can add the group parameter to the formula. In the example, we want our results to be grouped by the Country attribute. The formula becomes: The results are as follows: The variance for Canada is 204225.686. The variance for Australia is 185416.613.variance(column, group)variance($"Profit")
variance($"Profit",$"Country")