Selection of Variables and Imputed Datasets for Objects of Class BIFIEdata

This function select variables and some (or all) imputed datasets of an object of class BIFIEdata and saves the resulting object also of class BIFIEdata.

BIFIEdata.select(bifieobj, varnames=NULL, impdata.index=NULL)

Arguments

bifieobj

Object of class BIFIEdata

varnames

Variables chosen for the selection

impdata.index

Selected indices of imputed datasets

Value

An object of class BIFIEdata saved in a non-compact or compact way, see value cdata

See also

See BIFIE.data for creating BIFIEdata objects.

Examples

#############################################################################
# EXAMPLE 1: Some manipulations of BIFIEdata objects created from data.timss1
#############################################################################
data(data.timss1)
data(data.timssrep)

# create BIFIEdata
bdat1 <- BIFIEsurvey::BIFIE.data( data.list=data.timss1, wgt=data.timss1[[1]]$TOTWGT,
            wgtrep=data.timssrep[, -1 ])
summary(bdat1)

# create BIFIEcdata object
bdat2 <- BIFIEsurvey::BIFIE.data( data.list=data.timss1, wgt=data.timss1[[1]]$TOTWGT,
            wgtrep=data.timssrep[, -1 ], cdata=TRUE )
summary(bdat2)

# selection of variables for BIFIEdata object
bdat1a <- BIFIEsurvey::BIFIEdata.select( bdat1, varnames=bdat1$varnames[ 1:7 ] )
# selection of variables and 1st, 2nd and 4th imputed datasets of BIFIEcdata object
bdat2a <- BIFIEsurvey::BIFIEdata.select( bdat2, varnames=bdat2$varnames[ 1:7 ],
                impdata.index=c(1,2,4) )
summary(bdat1a)
summary(bdat2a)