as_idata                Create individual data frame from a covset
                        object
build_covform           Build a object or formula to use with covset
covset                  Covobj and covset objects
dmutate                 mutate a data frame, adding random variables.
mutate_random           Add random variates to a data frame
rbinomial               Simulate from binomial distribution
rmvnorm                 Simulate from multivariate normal distribution
