27.03.2013 Views

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

ROTATION Subcommand<br />

FACTOR 557<br />

ROTATION specifies the factor rotation method. It can also be used to suppress the rotation<br />

phase entirely.<br />

• Only one ROTATION subcommand is allowed. If multiple ROTATION subcommands are<br />

specified, only the last is performed.<br />

• If any ANALYSIS subcommand is explicitly specified, all ROTATION subcommands before<br />

the last ANALYSIS subcommand are ignored. If any EXTRACTION subcommand is explicitly<br />

specified, all ROTATION subcommands before the last EXTRACTION subcommand are<br />

ignored.<br />

• If ROTATION is omitted together with EXTRACTION, varimax rotation is used.<br />

• If ROTATION is omitted but EXTRACTION is not, factors are not rotated.<br />

• Keyword NOROTATE on the ROTATION subcommand produces a plot of variables in<br />

unrotated factor space if the PLOT subcommand is also included for the analysis.<br />

VARIMAX Varimax rotation. This is the default if ROTATION is entered without specifications<br />

or if EXTRACTION and ROTATION are both omitted. Varimax rotation<br />

can also be requested with keyword DEFAULT.<br />

EQUAMAX Equamax rotation.<br />

QUARTIMAX Quartimax rotation.<br />

OBLIMIN(n) Direct oblimin rotation. This is a nonorthogonal rotation; thus, a factor<br />

correlation matrix will also be displayed. You can specify a delta ( n ≤ 0.8)<br />

in parentheses. The value must be less than or equal to 0.8. The default is 0.<br />

PROMAX(n) Promax rotation. This is a nonorthogonal rotation; thus, a factor correlation<br />

matrix will also be displayed. For this method, you can specify a realnumber<br />

value greater than 1. The default is 4.<br />

NOROTATE No rotation.<br />

Example<br />

FACTOR VARIABLES=V1 TO V12<br />

/EXTRACTION=ULS<br />

/ROTATION<br />

/ROTATION=OBLIMIN.<br />

• The first ROTATION subcommand specifies the default varimax rotation.<br />

• The second ROTATION subcommand specifies an oblimin rotation based on the same<br />

extraction of factors.<br />

SAVE Subcommand<br />

SAVE allows you to save factor scores from any rotated or unrotated extraction as new variables<br />

in the working data file. You can use any of the three methods for computing the factor<br />

scores.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!