visitSequence
argumentThis helper function creates a valid visitSequence
. The
visitSequence
is an argument to the mice
function that
specifies the sequence in which blocks are imputed.
make.visitSequence(data = NULL, blocks = NULL)
Vector containing block names
A data frame or a matrix containing the incomplete data. Missing
values are coded as NA
.
List of vectors with variable names per block. List elements
may be named to identify blocks. Variables within a block are
imputed by a multivariate imputation method
(see method
argument). By default each variable is placed
into its own block, which is effectively
fully conditional specification (FCS) by univariate models
(variable-by-variable imputation). Only variables whose names appear in
blocks
are imputed. The relevant columns in the where
matrix are set to FALSE
of variables that are not block members.
A variable may appear in multiple blocks. In that case, it is
effectively re-imputed each time that it is visited.
mice