SPORD and SPNOM Keywords (CATPCA command)

The following keywords are used with SPORD and SPNOM:

DEGREE. The degree of the polynomial. It can be any positive integer. The default degree is 2.

INKNOT. The number of interior knots. The minimum is 0, and the maximum is the number of categories of the variable minus 2. If the specified value is too large, the procedure adjusts the number of interior knots to the maximum. The default number of interior knots is 2.