Fractional Factorial Design Objects

DESCRIPTION:

Tests for objects of class fac.design. Primarily designed for use with Subscript.

USAGE:

is.fac.design(x) 

REQUIRED ARGUMENTS:

x
a S-PLUS object.

VALUE:

is.fac.design tests whether x is a fac.design object. That is, it returns TRUE if x satisfies a condition for fac.design and FALSE otherwise.

NOTE:

The testing is not exhaustive, and does not guarantee that x satisfies all of the properties (loosely) required of a fac.design object.