A TYPE=QUAD data set contains the coefficients of a quadratic function of the variables in observations with _TYPE_=’QUAD’. PROC DISCRIM stores quadratic discriminant function coefficients in a TYPE=QUAD data set when you specify METHOD=NORMAL
(the default method), POOL=NO, and an OUTSTAT= data set; the data set can be used in a subsequent invocation of PROC DISCRIM
to classify additional observations. Many other statistics can be included depending on the options used. See Chapter 35: The DISCRIM Procedure, for details.