Data description file
The data description file consists of four types of statement.
The end of each statement group is marked with a dot, either at the end of the line or on a line by itself.
TITLE statement
This defines the run title which is read from tt statements following the a statement. If there is no run title in the Quantum program, this statement is omitted.
DATA LIST statement
This names the data file, defines the data format and names the variables (axes) present in the data. Variables in this list appear in the order the corresponding axes are named on the tab statements in the Quantum run. Axes which are used by more than one tab statement are ignored after the first time. The Quantum statements:
tab age sex
tab occup age
becomes:
DATA LIST FILE="data.qsp" FREE/
age
sex
occup
The order of variables in this list defines the order of values in the data file (see below).
VARIABLE LABELS statements
One of these statements is created for each variable, naming the variable and defining its title, if any. The title is read from the hd= option on the l statement. If no heading is given, the axis name is used instead.
VALUE LABELS statements
These statements generally follow the VARIABLE LABELS statement. They introduce the values which are found in the data file for the variables. Each value has a text description and corresponds to some extent to an element in an axis. For example, the Quantum axis:
l sex;hd=Sex of Respondent
col 15;Base;Male;Female
becomes:
VARIABLE LABELS sex "Sex of Respondent"
VALUE LABELS sex
1 "Male"
2 "Female"
See also