Test for robust.design Objects

DESCRIPTION:

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

USAGE:

is.robust.design(x) 

REQUIRED ARGUMENTS:

x
a S-PLUS object.

VALUE:

is.robust.design tests whether x is a robust.design object. That is, it returns TRUE if x satisfies a condition for robust.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 robust.design object.