# Function pastDay
pastDay(
measure,name?):CalculatedMeasure
Creates a calculated measure that calculates the value for the previous day.
# Parameters
| Parameter | Type | Description |
|---|---|---|
measure | Measure | Measure to apply past value to |
name? | string | Name for the new measure |
# Returns
A calculated measure instance
# Example
Calculate total cost for the previous day from the Sample Ecommerce data model.
measureFactory.pastDay(measureFactory.sum(DM.Commerce.Cost))