bin                     binary representation of x (an element from 1
                        to m) with m components
coa                     construct a component orthogonal array with m
                        components
cycle                   cycle elements of a vector by one element to
                        right
doofa.pwo               construct a design for order-of-addition
                        experiment under pwo model with n runs and m
                        components
gen.design2             Repeat the process of design generation using
                        doofa.pwo several times and return the best
                        design
initial.design          create an initial design of o-of-a with n rows
                        and m columns
one                     create a matrix of 1s with t rows
pwo                     create PWO ordering of a given run of a design
revbin                  reverse of bin function i.e., returns which
                        elements of a binary vector is 1
shuffle                 shuffle elements of a randomly chosen row of x
                        matrix
swap                    swap elements at i and i+1 of a vector
vbin                    vectorized bin function
vrevbin                 vectorized revbin function
