mids2datlist: Converting a 'mids', 'mids.1chain' or 'mids.nmi' Object in a...

In miceadds: Some Additional Multiple Imputation Functions, Especially for 'mice'

Converting a mids, mids.1chain or mids.nmi Object in a Dataset List

Description

Converts a mids, mids.1chain or mids.nmi object in a dataset list.

Usage

mids2datlist(midsobj, X=NULL)

Arguments

midsobj	Object of class mids, mids.1chain or mids.nmi
X	Optional data frame of variables to be included in imputed datasets.

Value

List of multiply imputed datasets of classes datlist or nested.datlist.

Examples

## Not run: 
#############################################################################
# EXAMPLE 1: Imputing nhanes data and convert result into a dataset list
#############################################################################

data(nhanes,package="mice")

#**** imputation using mice
imp1 <- mice::mice( nhanes, m=3, maxit=5 )
# convert mids object into list
datlist1 <- miceadds::mids2datlist( imp1 )

#**** imputation using mice.1chain
imp2 <- miceadds::mice.1chain( nhanes, burnin=4, iter=20, Nimp=5 )
# convert mids.1chain object into list
datlist2 <- miceadds::mids2datlist( imp2 )

#############################################################################
# EXAMPLE 2: Nested multiple imputation and datalist conversion
#############################################################################

library(BIFIEsurvey)
data(data.timss2, package="BIFIEsurvey" )
datlist <- data.timss2
   # list of 5 datasets containing 5 plausible values

# remove first four variables
M <- length(datlist)
for (ll in 1:M){
    datlist[[ll]] <- datlist[[ll]][, -c(1:4) ]
                }

#***************
# (1) nested multiple imputation using mice
imp1 <- miceadds::mice.nmi( datlist,  m=4, maxit=3 )
summary(imp1)

#***************
# (2) nested multiple imputation using mice.1chain
imp2 <- miceadds::mice.nmi( datlist, Nimp=4, burnin=10,iter=22, type="mice.1chain")
summary(imp2)

#**************
# conversion into a datalist
datlist.i1 <- miceadds::mids2datlist( imp1 )
datlist.i2 <- miceadds::mids2datlist( imp2 )

#############################################################################
# EXAMPLE 3: mids object conversion and inclusion of further variables
#############################################################################

data(data.ma05)
dat <- data.ma05

# imputation
resp <- dat[, - c(1:2) ]
imp <- mice::mice( resp, method="norm", maxit=2, m=3 )

# convert mids object into datalist
datlist0 <- miceadds::mids2datlist( imp )
# convert mids object into datalist and include some id variables
datlist1 <- miceadds::mids2datlist( imp, X=dat[,c(1,2) ] )

## End(Not run)

miceadds documentation built on May 29, 2024, 11:05 a.m.