Titlebook: How SAS Works; A Comprehensive Intr Paul A. Herzberg Textbook 1990Latest edition the author and Captus Press Inc. 1990 calculus.information

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The Assignment and Sum StatementsIn this chapter we describe the assignment and sum statements. Both statements require what are known as .. Just as variables can be either numeric or character, expressions can be of either type. Numeric expressions are described in this chapter; character expressions in Chapter 7.

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Conditional StatementsThere are two types of conditional statements in the SAS language: the IF-THEN statement and the subsetting IF statement. The IF-THEN statement is described in this chapter; the subsetting IF statement is described in Chapter 10. Both types of statements require a .; these expressions are described in this chapter.

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The Data Step and SAS Data Setsnput and modify data. PROC steps are typically used to perform calculations and print results. This separation of tasks into two types of steps is very helpful to both the beginner and the expert in planning and creating a SAS job.

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Some SAS Descriptive Proceduresures MEANS and UNIVARIATE in this chapter go somewhat further: they compute basic statistics such as means and standard deviations. The principal difference between the two PROCs is that PROC MEANS prints a single table for all specified variables whereas PROC UNIVARIATE prints one table of statisti

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Character Variables and the Length StatementNPUT statement. In this chapter we describe an alternative way, the LENGTH statement, to specify that a variable is character. The LENGTH statement, as its name implies, is also used to specify the length of a variable. We also describe character expressions and their use in assignment statements.