MATRIX Subcommand (FACTOR command)

MATRIX reads and writes 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 (matrix type= 'savfile'|'dataset'). 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, a previously declared dataset available in the current session, or an asterisk to replace the active dataset. If you specify an asterisk or a dataset name, the matrix data file is not stored on disk unless you use SAVE or XSAVE.

IN (matrix type= 'savfile'|'dataset'). 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 active dataset. If the matrix file is another file, specify the filename or dataset name in parentheses. A matrix file read from an external file or another dataset in the current session does not replace the active dataset.