Sample data set with four predictors and a dependent variable. A
missing monotone pattern was generated in three predictors to
illustrate the gamlss imputation method.
For the data generation process a parameter beta equal to
c(1.3, .8, 1.5, 2.5)
and a predictor matrix X <-
cbind(X.1, X.2, X.3, X.4)
are defined. Then, the sample data set
is created with the model y ~ X.1 + X.2 + X.3 + X.4
.