SPSS® 12.0 Command Syntax Reference

728 Syntax Reference
Saving scores. You can save object scores in the working data file.
Writing matrices. You can write a matrix data file containing category quantifications for use
in further analyses.
Basic Specification
• The basic specification is HOMALS and the VARIABLES subcommand. By default,
HOMALS analyzes all of the variables listed for all cases and computes two solutions.
Frequencies, eigenvalues, discrimination measures, and category quantifications are
displayed and category quantifications and object scores are plotted.
Subcommand Order
• Subcommands can appear in any order.
Syntax Rules
Operations
Limitations
• If ANALYSIS is specified more than once, HOMALS is not executed. For all other subcommands,
if a subcommand is specified more than once, only the last occurrence is executed.
• HOMALS treats every value in the range 1 to the maximum value specified on VARIABLES
as a valid category. If the data are not sequential, the empty categories (categories with
no valid data) are assigned zeros for all statistics. You may want to use RECODE or
AUTORECODE before HOMALS to get rid of these empty categories and avoid the
unnecessary output (see the SPSS Syntax Reference Guide for more information on
AUTORECODE and RECODE).
• String variables are not allowed; use AUTORECODE to recode string variables into numeric
variables.
• The data (category values) must be positive integers. Zeros and negative values are treated
as system-missing, which means that they are excluded from the analysis. Fractional
values are truncated after the decimal and are included in the analysis. If one of the levels
of a variable has been coded 0 or a negative value and you want to treat it as a valid category,
use the AUTORECODE or RECODE command to recode the values of that variable.
• HOMALS ignores user-missing value specifications. Positive user-missing values less
than the maximum value specified on the VARIABLES subcommand are treated as valid
category values and are included in the analysis. If you do not want the category included,
use COMPUTE or RECODE to change the value to something outside of the valid range.