mids objects x and
y into a single mids object. The two
mids objects should have the same underlying
multiple imputation model and should be fitted on exactly
the same dataset. If the number of imputations in x
is m(x) and in y is m(y) then the
combination of both objects contains m(x)+m(y)
imputations.ibind(x, y)mids object.mids object.midsmids, rbind.mids,
cbind.mids