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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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558 FACTOR<br />

• Only one SAVE subcommand is executed. If you specify multiple SAVE subcommands,<br />

only the last is executed.<br />

• SAVE must follow the last ROTATION subcommand.<br />

• If no ROTATION subcommand is specified after the last EXTRACTION subcommand, SAVE<br />

must follow the last EXTRACTION subcommand and no rotation is used.<br />

• If neither ROTATION nor EXTRACTION is specified, SAVE must follow the last ANALYSIS<br />

subcommand and the default extraction and rotation are used to compute the factor scores.<br />

• SAVE subcommands before any explicitly specified ANALYSIS, EXTRACTION, or ROTATION<br />

subcommands are ignored.<br />

• You cannot use the SAVE subcommand if you are replacing the working data file with<br />

matrix materials (see “Matrix Output” on p. 559).<br />

• The new variables are added to the end of the working data file.<br />

Keywords to specify the method of computing factor scores are:<br />

REG Regression method. This is the default.<br />

BART Bartlett method.<br />

AR Anderson-Rubin method.<br />

DEFAULT The same as REG.<br />

• After one of the above keywords, specify in parentheses the number of scores to save and<br />

a rootname to use in naming the variables.<br />

• You can specify either an integer or the keyword ALL. The maximum number of scores you<br />

can specify is the number of factors in the solution.<br />

• FACTOR forms variable names by appending sequential numbers to the rootname you specify.<br />

The rootname must begin with a letter and conform to the rules for variable names. For information<br />

on variable naming rules, see “Variable Names” on p. 21.<br />

• If you do not specify a rootname, FACTOR forms unique variable names using the formula<br />

FACn_m, where m increments to create a new rootname and n increments to create a unique<br />

variable name. For example, FAC1_1, FAC2_1, FAC3_1, and so on will be generated for the<br />

first set of saved scores and FAC1_2, FAC2_2, FAC3_2, and so on for the second set.<br />

• FACTOR automatically generates variable labels for the new variables. Each label contains<br />

information about the method of computing the factor score, its sequential number, and the<br />

sequential number of the analysis.<br />

Example<br />

FACTOR VARIABLES=V1 TO V12<br />

/CRITERIA FACTORS(4)<br />

/ROTATION<br />

/SAVE REG (4,PCOMP).<br />

• Since there is no EXTRACTION subcommand before the ROTATION subcommand, the<br />

default principal components extraction is performed.<br />

• The CRITERIA subcommand specifies that four principal components should be extracted.

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