How do you write an if statement in SAS?

Syntax. IF (condition1) THEN result1; ELSE IF (condition2) THEN result2; ELSE IF (condition3) THEN result3; If the condition evaluates to be true, then the respective observation is processed.

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Can you use or in an if statement SAS?

run; Usually the generic understanding is whenever we don’t want either ‘as’ or ‘aq’, we can use OR operator in IF statement.

How do you include or exclude specific variables in a data set?

As before, the DROP= option must be placed in parentheses and follow the name of the data set from you which you want SAS to exclude variables. The list of variables that you specify to drop must be separated by at least one blank space.

What is meaning of subsetting if?

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.

What is subsetting if?

Can you use if/then logic in a data step?

Creating New Variables Using if-then;if-then-else; and if-then-else-then Statements. 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.

Which SAS statements are useful for filtering or subsetting rows of a data set?

Subsetting a SAS data set means extracting a part of the data set by selecting a fewer number of variables or fewer number of observations or both. While subsetting of variables is done by using KEEP and DROP statement, the sub setting of observations is done using DELETE statement.

Why is subsetting important?

The main purpose of subsetting is to save bandwidth on the network and storage space on the client computer. Subsetting may be favorable for the following reasons: restrict or divide the time range. select cross sections of data.

How do I split a value in SAS?

You can use the scan() function in SAS to quickly split a string based on a particular delimiter.

How does data Step work in SAS?

The DATA step consists of a group of SAS statements that begins with a DATA statement. The DATA statement begins the process of building a SAS data set and names the data set. The statements that make up the DATA step are compiled, and the syntax is checked. If the syntax is correct, then the statements are executed.

How do you filter data step?

Try it!

Select any cell within the range.
Select Data > Filter.
Select the column header arrow .
Select Text Filters or Number Filters, and then select a comparison, like Between.
Enter the filter criteria and select OK.

What does subsetting if mean in SAS?

What is the difference between where and subsetting if statements?

The subsetting IF statement can select observations from an existing SAS data set or from raw data that are read with the INPUT statement. The WHERE statement can select observations only from existing SAS data sets. The subsetting IF statement is executable; the WHERE statement is not.

Does SAS continue to execute statements in the data step?

That is, if the expression is true for the observation or record (its value is neither 0 nor missing), SAS continues to execute statements in the DATA step and includes the current observation in the data set. The resulting SAS data set or data sets contain a subset of the original external file or SAS data set.

Why is subsetting if less efficient than where statement?

The subsetting IF might be less efficient than the WHERE statement because it must read each observation from the input data set into the program data vector. The subsetting IF statement and WHERE statement can produce different results in DATA steps that interleave, merge, or update SAS data sets.