The function mc_twin helps to build the components
of the matrix linear predictor associated with ACDE models for
analysis of twin data.
mc_twin(id, twin.id, type, replicate = NULL, structure, data) mc_twin_bio(id, twin.id, type, replicate = NULL, structure, data) mc_twin_full(id, twin.id, type, replicate, formula, data)
| id | name of the column (string) containing the twin index. It should be the same index (number) for both twins. |
|---|---|
| twin.id | name of the column (string) containing the twin index inside the pair. In general 1 for the first twin and 2 for the second twin. |
| type | name of the column (string) containing the indication of the twin as mz or dz. It should be a factor with only two levels mz and dz. Be sure that the reference level is mz. |
| replicate | name of the column (string) containing the index for more than one observation taken at the same twin pair. It is used for example in twin longitudinal studies. In that case, the replication column should contain the time index. |
| structure | model type options are full, flex, uns, ACE, ADE, AE, CE and E. See example for details. |
| data | data set. |
| formula | internal. |
Bonat, W. H. (2018). Multiple Response Variables Regression Models in R: The mcglm Package. Journal of Statistical Software, 84(4):1--30.
A list of matrices of dgCMatrix class.
mc_id, mc_dist, mc_car,
mc_rw, mc_ns, mc_dglm and mc_mixed.