View source: R/BIFIE.bifiedata2bifiecdata.R
BIFIE.BIFIEdata2BIFIEcdata | R Documentation |
BIFIEdata
Objects
Functions for converting and selecting objects of class BIFIEdata
.
The function BIFIE.BIFIEdata2BIFIEcdata
converts the BIFIEdata
objects in a non-compact form (cdata=FALSE
) into an object of
class BIFIEdata
in a compact form (cdata=TRUE
).
The function BIFIE.BIFIE2data2BIFIEdata
takes the reverse operation.
The function BIFIE.BIFIEdata2datalist
converts a (part) of the
object of class BIFIEdata
into a list of multiply-imputed
datasets.
BIFIE.BIFIEdata2BIFIEcdata(bifieobj, varnames=NULL, impdata.index=NULL) BIFIE.BIFIEcdata2BIFIEdata(bifieobj, varnames=NULL, impdata.index=NULL) BIFIE.BIFIEdata2datalist(bifieobj, varnames=NULL, impdata.index=NULL, as_data_frame=FALSE)
bifieobj |
Object of class |
varnames |
Variables chosen for the selection |
impdata.index |
Selected indices of imputed datasets |
as_data_frame |
Logical indicating whether list of length one should be converted into a data frame |
An object of class BIFIEdata
saved in a non-compact
or compact way, see value cdata
.
BIFIE.data
############################################################################# # EXAMPLE 1: BIFIEdata conversions using data.timss1 dataset ############################################################################# data(data.timss1) data(data.timssrep) # create BIFIEdata object bdat1 <- BIFIEsurvey::BIFIE.data( data.list=data.timss1, wgt=data.timss1[[1]]$TOTWGT, wgtrep=data.timssrep[, -1 ]) summary(bdat1) # convert BIFIEdata object bdat1 into a BIFIEcdata object with # only using the first three datasets and a variable selection bdat2 <- BIFIEsurvey::BIFIE.BIFIEdata2BIFIEcdata( bifieobj=bdat1, varnames=bdat1$varnames[ c(1:7,10) ] ) # convert bdat2 into BIFIEdata object and only use the first three imputed datasets bdat3 <- BIFIEsurvey::BIFIE.BIFIEcdata2BIFIEdata( bifieobj=bdat2, impdata.index=1:3) # object summaries summary(bdat1) summary(bdat2) summary(bdat3) ## Not run: ############################################################################# # EXAMPLE 2: Extract unique elements in BIFIEdata object ############################################################################# data(data.timss1) data(data.timssrep) # create BIFIEdata object bifieobj <- BIFIEsurvey::BIFIE.data( data.list=data.timss1, wgt=data.timss1[[1]]$TOTWGT, wgtrep=data.timssrep[, -1 ]) summary(bifieobj) # define variables for which unique values should be extracted vars <- c( "female", "books","ASMMAT" ) # convert these variables from BIFIEdata object into a list of datasets bdatlist <- BIFIEsurvey::BIFIE.BIFIEdata2datalist( bifieobj, varnames=vars ) # look for unique values in first dataset for variables values <- lapply( bdatlist[[1]], FUN=function(vv){ sort( unique( vv ) ) } ) # number of unique values in first dataset Nvalues <- lapply( bdatlist[[1]], FUN=function(vv){ length( unique( vv ) ) } ) # number of unique values in all datasets Nvalues2 <- lapply( vars, FUN=function(vv){ #vv <- vars[1] unlist( lapply( bdatlist, FUN=function(dd){ length( unique( dd[,vv] ) ) } ) ) } ) # --> for extracting the number of unique values using BIFIE.by and a user # defined function see Example 1, Model 3 in "BIFIE.by" ## End(Not run)
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