SPSS® 12.0 Command Syntax Reference

FACTOR 559
• The ROTATION subcommand requests the default varimax rotation for the principal
components.
• The SAVE subcommand calculates scores using the regression method. Four scores will be
added to the file: PCOMP1, PCOMP2, PCOMP3, and PCOMP4.
MATRIX Subcommand
MATRIX reads and writes SPSS-format matrix data files.
• MATRIX must always be specified first.
• Only one IN and one OUT keyword can be specified on the MATRIX subcommand. If either
IN or OUT is specified more than once, the FACTOR procedure is not executed.
• The matrix type must be indicated on IN or OUT. The types are COR for a correlation matrix,
COV for a covariance matrix, and FAC for a factor loading matrix. Indicate the matrix type
within parentheses immediately before you identify the matrix file.
• If you use both IN and OUT on MATRIX, you can specify them in either order. You cannot
write a covariance matrix if the input matrix is a factor loading matrix or a correlation
matrix that does not contain standard deviations (STDDEV or SD).
• If you read in a covariance matrix and write out a factor loading matrix, the output factor
loadings are rescaled.
OUT (filename) Write a matrix data file. Specify the matrix type (COR, COV, FAC, or FSC)
and the matrix file in parentheses. For the matrix data file, specify a filename
to store the matrix materials on disk or an asterisk to replace the working data
file. If you specify an asterisk, the matrix data file is not stored on disk unless
you use SAVE or XSAVE.
IN (filename) Read a matrix data file. Specify the matrix type (COR, COV, or FAC) and the
matrix file in parentheses. For the matrix data file, specify an asterisk if the
matrix data file is the working data file. If the matrix file is another file,
specify the filename in parentheses. A matrix file read from an external file
does not replace the working data file.
Matrix Output
FACTOR can write matrix materials in the form of a correlation matrix, a covariance matrix, a
factor loading matrix, or a factor score coefficients matrix.
• The correlation and covariance matrix materials include counts, means, and standard deviations
in addition to correlations or covariances.
• The factor loading matrix materials contain only factor values and no additional statistics.
• The factor score coefficients materials include means and standard deviations, in addition
to factor score coefficients.
• See “Format of the Matrix Data File” below for a description of the file.
• FACTOR generates one matrix per split file.
• Any documents contained in the working data file are not transferred to the matrix file.