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Using More Than One Observation in a Calculation

Introduction to Using More Than One Observation in a Calculation

Purpose

In this section you will learn about calculations that require more than one observation. Examples of those calculations include:

• accumulating a total across a data set or a BY group

• saving a value from one observation in order to compare it to a value in a later observation

Prerequisites

Before proceeding with this section, you should understand the concepts presented in the following parts:

• Understanding DATA Step Processing.

• Working with Grouped or Sorted Observations.

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