Example: Using Saved Coefficients to Score an External File (FACTOR command) 

MATRIX.
GET A /FILE="fsc.sav".
GET B /FILE="ext_data_standardized.sav" /VAR=varlist.
COMPUTE SCORES=A*TRANSPOS(B).
SAVE SCORES /OUTFILE="scored.sav".
END MATRIX.
  • This example scores an external file using the factor score coefficients from a previous analysis, say, upon original.sav.
  • Factor score coefficients are read from fsc.sav into A.
  • The data are read from ext_data_standardized.sav into B. The variable values in the external file should be standardized. Note that if the values in ext_data_standardized.sav are standardized based upon the means and standard deviations of the unstandardized values in ext_data.sav, and not upon the means and standard deviations of values in original.sav, then this analysis will be different from one in which original.sav and ext_data.sav are merged and FACTOR is run using the SELECT subcommand with cases from original.sav selected for use in computing the correlation or covariance matrix.

    If there are missing values, add /MISSING=OMIT or /MISSING=0 to the second GET statement to remove cases with missing values or impute the mean (0, since the variables are standardized).

  • The scores are saved to scored.sav.