Example 9.3 Determining Whether a Variable Is Character or Numeric
Goal
Determine whether a variable is character or numeric to ensure that you have the right type of data for your application.
Example Features
| Featured Step | DATA step |
| Featured Step Options and Statements | ATTRN, CLOSE, INDEX, OPEN, UPCASE, VARNAME, and VARTYPE functions CALL SYMPUTX routine Open code macro variables |
| Related Technique | PROC SQL, DICTIONARY.COLUMNS table, INTO clause to create a macro variable, INDEX and UPCASE functions |
| A Closer Look | Using the SAS File I/O Functions Specifying Variable Lists |
Input Data Set
Data set ENTRANCE_EXAM stores exam results for 15 applicants to an academic program. The results are saved in a mix of character and numeric variables.
ENTRANCE_EXAM ...
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