Example 9.2 Determining the Type of a Variable's Content
Goal
Determine whether a character variable's value contains numeric data, alphabetic text, missing data, or nonalphanumeric characters. Save the values that are determined to be numeric in a numeric variable.
Example Features
| Featured Step | DATA step |
| Featured Step Options and Statements | COMPRESS, INPUT with ?? format modifier, NOTALPHA, REVERSE, STRIP, SUBSTR, and UPCASE functions |
| A Closer Look | Understanding Functions That Evaluate the Content of Variable Values |
Input Data Set
Data set CHEMTEST contains preliminary results of 14 lab samples in character variable CHEM_PPB. The values of CHEM_PPB contain a mix of alphanumeric and other characters.
CHEMTEST Obs sample chem_ppb 1 57175 1250.3 ...
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