Note the following:
• The column names are created by appending the values of the Column Variables to this prefix, separated by underscores ( _ ).
• The created names also appear in the Experimental Design SAS Data Set as values of the variable ColumnName .
• The prefix must begin with a letter or underscore, and cannot contain any blank or special characters.
• If you leave this field blank , it is assumed the first Column Variable that you specify has values that satisfy this condition.
Type the desired prefix into the Prefix for Column Names in Tall Data Set field.