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

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

550 FACTOR<br />

MEANSUB Replace missing values with the variable mean. All cases are used after the<br />

substitution is made. If INCLUDE is also specified, user-missing values are<br />

included in the computation of the means, and means are substituted only<br />

for the system-missing value. If SELECT is in effect, only the values of<br />

selected cases are used in calculating the means used to replace missing<br />

values for selected cases in analysis and for all cases in computing factor<br />

scores.<br />

INCLUDE Include user-missing values. Cases with user-missing values are treated as valid.<br />

METHOD Subcommand<br />

METHOD specifies whether the factor analysis is performed on a correlation matrix or a covariance<br />

matrix.<br />

• Only one METHOD subcommand is allowed. If more than one is specified, the last is in<br />

effect.<br />

CORRELATION Perform a correlation matrix analysis. This is the default.<br />

COVARIANCE Perform a covariance matrix analysis. Valid only with principal components,<br />

principal axis factoring, or image factoring methods of extraction.<br />

The program issues an error if this keyword is specified when the input is a<br />

factor loading matrix or a correlation matrix that does not contain standard<br />

deviations (STDDEV or SD).<br />

SELECT Subcommand<br />

SELECT limits cases used in the analysis phase to those with a specified value for any one<br />

variable.<br />

• Only one SELECT subcommand is allowed. If more than one is specified, the last is in<br />

effect.<br />

• The specification is a variable name and a valid value in parentheses. A string value must<br />

be specified within quotes. Multiple variables or values are not permitted.<br />

• The selection variable does not have to be specified on the VARIABLES subcommand.<br />

• Only cases with the specified value for the selection variable are used in computing the<br />

correlation or covariance matrix. You can compute and save factor scores for the unselected<br />

cases as well as the selected cases.<br />

• SELECT is not valid if MATRIX = IN is specified.<br />

Example<br />

FACTOR VARIABLES = V1 TO V10<br />

/SELECT=COMPLETE(1)<br />

/SAVE (4).<br />

• FACTOR analyzes all ten variables named on VARIABLES, using only cases with a value of<br />

1 for the variable COMPLETE.

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

Saved successfully!

Ooh no, something went wrong!