missMDA (version 1.19)

prelim: Converts a dataset imputed by MIMCA, MIPCA or MIFAMD into a mids object

Description

This function performs grouping and sorting operations on a multiply imputed dataset. It creates a mids object that is needed for input to with.mids, which allows analyse of the multiply imputed data set. The original incomplete data set needs to be available so that we know where the missing data are.

Usage

prelim(res.mi,X)

Value

imp.mids

An object of type mids

Arguments

res.mi

an output of the functions MIPCA, MIMCA or MIFAMD

X

the original incomplete data set corresponding to the res.mi argument

Author

Vincent Audigier , Francois Husson and Julie Josse

See Also

MIFAMD,MIPCA,MIMCA,with.mids,pool,summary.mira

Examples

if (FALSE) {
data(TitanicNA)

## First the number of components has to be chosen 
##   (for the reconstruction step)
## nb <- estim_ncpMCA(TitanicNA,ncp.max=5) ## Time-consuming, nb = 5

## Multiple Imputation
res.mi <- MIMCA(TitanicNA, ncp=5, verbose=T)

#Analysis
imp<-prelim(res.mi,TitanicNA)
fit <- with(data=imp,exp=glm(SURV~CLASS+AGE+SEX,family = "binomial"))

#Pooling
res.pool<-pool(fit)
summary(res.pool)
}