SPSS® 12.0 Command Syntax Reference

960 MATRIX DATA
Table 1 summarizes the status of each MATRIX DATA subcommand in relation to the
ROWTYPE_ specification.
Table 1 Subcommand requirements in relation to ROWTYPE_
Subcommand
Implicit ROWTYPE_
using CONTENTS
Explicit ROWTYPE_
on VARIABLES
FILE Defaults to INLINE Defaults to INLINE
VARIABLES Required Required
FORMAT Defaults to LOWER DIAG Defaults to LOWER DIAG
SPLIT Required if split files * Required if split files
FACTORS Required if factors Required if factors
CELLS Required if factors Inapplicable
CONTENTS Defaults to CORR Optional
N Optional Optional
* If the data do not contain values for the split-file variables, this subcommand can specify
a single variable, which is not specified on the VARIABLES subcommand.
Subcommand Order
• SPLIT and FACTORS, when used, must follow VARIABLES.
• The remaining subcommands can be specified in any order.
Syntax Rules
• No commands can be specified between MATRIX DATA and BEGIN DATA, not even a
VARIABLE LABELS or FORMAT command. Data transformations cannot be used until
after MATRIX DATA is executed.
Operations
• MATRIX DATA defines and writes data in one step.
• MATRIX DATA clears the working data file and defines a new working file.
• If CONTENTS is not specified and ROWTYPE_ is not specified on VARIABLES, MATRIX
DATA assumes that the data contain only CORR values and issues warning messages to
alert you to its assumptions.
• With the default format, data values, including diagonal values, must be in the lower triangle
of the matrix. If MATRIX DATA encounters values in the upper triangle, it ignores
those values and issues a series of warnings.
• With the default format, if any matrix rows span records in the data file, MATRIX DATA
cannot form the matrix properly.
• MATRIX DATA does not allow format specifications for matrix materials. The procedure
assigns the formats shown in Table 2. To change data formats, execute MATRIX DATA