Sas if then statement

An if-then statement can be used to create a new variable for a selected subset of the observations. For each observation in the data set, SAS evaluates the expression following the if.

Continues processing only those observations that meet the condition of the specified expression. The subsetting IF statement causes the DATA step to continue processing only those raw data records or those observations from a SAS data set that meet the condition of the expression that is specified in the IF statement. If the expression is true for the observation its value is neither 0 nor missing , SAS continues to execute the DATA step and includes the observation in the output data set. If the expression is false its value is 0 or missing , no further statements are processed for that observation or record, the current observation is not written to the data set, and the remaining program statements in the DATA step are not executed. SAS immediately returns to the beginning of the DATA step because the subsetting IF statement does not require additional statements to stop processing observations.

Sas if then statement

The ELSE statement is optional. It can be used to execute a statement if the condition is not true. Sometimes, we might need to execute more than one statement when the condition is met. Sign In. Members' area. Master SAS in 30 days! Start Your Free Training Now. The data set above contains 10 students and their exam results. DO Group. The DO group starts with the DO statement. Do you have a hard time learning SAS? Start Course for Free! IF Statement.

Hii Sir, Read sashelp. Overview Again, once you've read your data into a SAS data set, you probably want to do something with it. The following SAS program illustrates the use of alternative intervals as well as the alternative syntax sas if then statement the comparison operators:.

Task 1 : Suppose you are asked to exclude some of the observations in a SAS data set from an analysis that you are generating. For example, you want to exclude all IDs whose values are greater than Deepanshu founded ListenData with a simple objective - Make analytics easy to understand and follow. He has over 10 years of experience in data science. How behind the scene it works.

The following examples show how to use each of these statements in practice with the following dataset in SAS:. The following tutorials explain how to perform other common tasks in SAS:. January 17, January 12, January 18, How to Add Target Line to Graph in How to Convert Date of Birth to Age

Sas if then statement

Executes a SAS statement for observations that meet specific conditions. Global Statements by Category. Array Reference Statement. Assignment Statement. BY Statement. CALL Statement. Comment Statement. DATA Statement.

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RUN this. When the expression is false, SAS ignores the statement following then. Necessary cookies are absolutely essential for the website to function properly. Cookie Settings Accept. At end only else how it works? One thing though — when we do, we have to be extra careful to make sure that our conditions are mutually exclusive. It doesn't really matter which of the two syntax choices you use. Ann 3. That is, a missing value. You may have noticed, after the condition that takes care of missing values, that the conditions appear in order from A, B, PUT: Column. Notify of. You didn't specify what data to print. Deepanshu founded ListenData with a simple objective - Make analytics easy to understand and follow. Task 2: Suppose you want to set a tag on all the IDs.

The expression is true if a non-zero or non-missing result is generated. Various statements control the flow of execution of statements within the data step. SAS evaluates the condition following the IF statement to determine whether it is true or false.

Get latest articles from SASCrunch. These cookies track visitors across websites and collect information to provide customized ads. First, inspect the program to make sure you understand the code. If you try it, you'll soon learn that SAS will hiccup at you. A person whose age is 40 or younger will not be assigned to an agegroup, and their agegroup variable will be missing. We can use any of the standard comparison operators to make our comparisons as long as we follow the syntax that SAS expects, which is:. Launch and run the SAS program. In this lesson, we learned how to write if-then-else statements in order to change the contents of our SAS data set. One rather tedious solution would be to check for all possible "typings" of the words "failed" and "incomp" for incomplete. Our comparisons could just as easily involve character variables. DO: Iterative. In the previous program, the conditions were written using the AND operator. Create an Account Login. Bart 2. Master SAS in 30 Days.