SPSS® 12.0 Command Syntax Reference

862 MANOVA: Univariate
matrix data file. The external matrix file MANMTX is specified in parentheses after IN on
the MATRIX subcommand.
• MANMTX does not replace PRSNNL as the working file.
Example
GET FILE=MANMTX.
MANOVA SEPALLEN SEPALWID PETALLEN PETALWID BY TYPE(1,3)
/MATRIX=IN(*).
• This example assumes that you are starting a new session and want to read an existing
SPSS matrix data file. GET retrieves the matrix file MANMTX.
• An asterisk is specified in parentheses after IN on the MATRIX subcommand to read the
working data file. You can also leave the parentheses empty to indicate the default.
• If the GET command is omitted, SPSS issues an error message.
• If you specify MANMTX in parentheses after IN, SPSS issues an error message.
ANALYSIS Subcommand
ANALYSIS allows you to work with a subset of the continuous variables (dependent variable
and covariates) you have named on the MANOVA variable list. In univariate analysis of variance,
you can use ANALYSIS to allow factor-by-covariate interaction terms in your model
(see the DESIGN subcommand below). You can also use it to switch the roles of the dependent
variable and a covariate.
• In general, ANALYSIS gives you complete control over which continuous variables are to
be dependent variables, which are to be covariates, and which are to be neither.
• ANALYSIS specifications are like the MANOVA variables specification, except that factors
are not named. Enter the dependent variable and, if there are covariates, the keyword
WITH and the covariates.
• Only variables listed as dependent variables or covariates on the MANOVA variable list can
be entered on the ANALYSIS subcommand.
• In a univariate analysis of variance, the most important use of ANALYSIS is to omit covariates
altogether from the analysis list, thereby making them available for inclusion on
DESIGN (see the example below and the DESIGN subcommand examples).
• For more information on ANALYSIS, refer to MANOVA: Multivariate.
Example
MANOVA DEP BY FACTOR(1,3) WITH COV
/ANALYSIS DEP
/DESIGN FACTOR, COV, FACTOR BY COV.
• COV, a continuous variable, is included on the MANOVA variable list as a covariate.
• COV is not mentioned on ANALYSIS, so it will not be included in the model as a dependent
variable or covariate. It can, therefore, be explicitly included on the DESIGN subcommand.
• DESIGN includes the main effects of FACTOR and COV and the FACTOR by COV interaction.