For each row in a given design matrix it assigns a value 1, if the columns used in the design matrix are only used as an identity matrix (only one 1 and remaining columns all 0.
create.links(dm)
A vector of length=nrow(dm) with value of 0 except for rows that can accommodate a sin link (identity design matrix). This function is not currently used because it has not been thoroughly tested.
design matrix
Jeff Laake