Format of the Matrix Data File (REGRESSION command)

  • The file has two special variables created by the program: ROWTYPE_ and VARNAME_.
  • ROWTYPE_ is a short string variable with values MEAN, STDDEV, N, and CORR (for Pearson correlation coefficient).
  • VARNAME_ is a short string variable whose values are the names of the variables used to form the correlation matrix. When ROWTYPE_ is CORR, VARNAME_ gives the variable associated with that row of the correlation matrix.
  • The remaining variables in the file are the variables used to form the correlation matrix.
  • To suppress the constant term when ORIGIN is used in the analysis, value OCORR (rather than value CORR) is written to the matrix system file. OCORR indicates that the regression passes through the origin.