# Function pastMonth
pastMonth(
measure,name?):CalculatedMeasure
Creates a calculated measure that calculates the value for the same day or week in the previous month.
The time resolution is determined by the minimum date level of the date dimension in the query that uses the returned measure.
# 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 corresponding day or week one month ago from the Sample Ecommerce data model.
measureFactory.pastMonth(measureFactory.sum(DM.Commerce.Cost))