LastNPeriods

The LASTNPERIODS function refers to the values of the node’s last ‘n’ periods. It will give the result as the last 'n' periods' value.

Syntax

.LASTNPERIODS(n) - > [number]

Arguments

Arguments	Datatype	Description
n	Number	The integer that is less than the number of periods defined in the model.

Remarks

This function can only be used after referring a node for which this calculation needs to be done as shown below in the example.

Example

Consider a scenario where we have interest payments for Jan to Dec. Our objective is to calculate the interest paid in the last 6 months for each month.

2022 Periods	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Interest payments	0	78.37	74.06	69.71	65.33	60.91	56.46	51.96	47.43	42.86	38.26	33.61

To achieve this, the following formula should be written in the [Last 6 period's value] node:

SUM([Interest payments].LastNPeriods(6))

We give n as 6 since we want to calculate the last 6 months value. This will calculate the last 6 months value for each period. So for March it will add Jan & Feb, for April it will add Jan to Mar and so on.

Result

Last 6 period's value	0	0	78.37	152.43	222.14	287.47	348.38	404.84	378.43	351.8	324.95	297.88