Lag

Lag

Lag is located under Forecasting (  ) in Data Preparation, in the left task pane. Use the drag-and-drop method to use the algorithm in the canvas. Click the algorithm to view and select different properties for analysis.

Refer to Properties of Lag.



Properties of Lag

The available properties of Lag are as shown in the figures given below. Figure 2 below shows the basic configurations for Lag.


The table given below describes the different fields present on the properties of Lag.

Field

Description

Remark

RunIt allows you to run the node.-
ExploreIt allows you to explore the successfully executed node.-
Vertical Ellipses

The available options are

  • Run till node
  • Run from node
  • Publish as a model
  • Publish code
-

Task Name


It is the name of the task selected on the workbook canvas.

  • You can click the text field to edit or modify the task's name as required.
  • Space between words is not allowed in the Task Name.

Time ID Variable


It allows you to select the time variable.

The dataset should contain at least one time variable.

Target Variable


It allows you to select the variable for performing the Lag.

The variable selected should be discrete.

Group By


It allows you to select the function for grouping identical data.

  • Identical values of a column variable in different rows are grouped.
  • Usually, the variable selected is categorical.
  • Selecting Group By is optional

Advanced






Interval

It allows you to select the interval you want to calculate the Lag.

  • The available options are:
  • Day
  • Week
  • Month
  • Quarter
  • Year
  • By default, the interval is set to Month.

Start Time

It allows you to select the time beginning which the data is sliced.

By default, the value is None.

End Time

It allows you to select the time ending in which the data is sliced.

By default, the value is None.

Lag

It allows you to select the number by which the data points are shifted

  • You can select any integral value.
  • By default, the value is 1.

Node Configuration

It allows you to select the instance of the AWS server to provide control on the execution of a task in a workbook or workflow.

For more details, refer to Worker Node Configuration.

Example of Lag

Consider a Temperature dataset with 10 records. It contains columns for Date and corresponding daily temperature. A snippet of the input data is shown in the figure below.



We apply Lag to the input data. The selected values for Lag are given below.

Property

Value

Time ID Variable

Date

Target Variable

Temp

Group By

—

Interval

Day

Start Time

None

End Time

None

Lag

2

On the Data pane, you see that

  • the first two values in the Temp Lag column are 'na.'
  • Values in the Temp column are shifted two places in the Temp Lag column


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