Calculate Design Matrix from randomization sequence
makeDesignMatrix(R)randomization sequence, object of type randSeq
makeDesignMatrix converts the randomization sequence R
to its Matrix form. The resulting matrix has K columns, one for
each treatment group, and N rows, one for each subject. If a subject i
is randomized to a certain treatment j, the entry of (i,j) of the
matrix will be one, and all other entries in this row will be zero.