imputationList {mitools} | R Documentation |
Create and update imputationList
objects to be used as input to other
MI
routines.
imputationList(datasets,...) ## Default S3 method: imputationList(datasets,...) ## S3 method for class 'character': imputationList(datasets,dbtype,dbname,...) ## S3 method for class 'imputationList': update(object,...) ## S3 method for class 'imputationList': rbind(...) ## S3 method for class 'imputationList': cbind(...)
datasets |
a list of data frames corresponding to the multiple imputations, or a list of names of database tables or views |
dbtype |
"ODBC" or a database driver name for
DBI::dbDriver() |
dbname |
Name of the database |
object |
An object of class imputationList |
... |
Arguments tag=expr to update
will create new variables tag by evaluating expr
in each imputed dataset. Arguments to imputationList() are
passed to the database driver |
When the arguments to imputationList()
are character strings a
database-based imputation list is created. This can be a database
accessed through ODBC with the RODBC
package or a database with a
DBI-compatible driver. The dbname
and ...
arguments are
passed to dbConnect()
or odbcConnect()
to create a
database connection. Data are read from the database as needed.
For a database-backed object the update()
method creates variable
definitions that are evaluated as the data are read, so that read-only
access to the database is sufficient.
An object of class imputationList
or DBimputationList
data.dir<-system.file("dta",package="mitools") files.men<-list.files(data.dir,pattern="m.\.dta$",full=TRUE) men<-imputationList(lapply(files.men, foreign::read.dta)) files.women<-list.files(data.dir,pattern="f.\.dta$",full=TRUE) women<-imputationList(lapply(files.women, foreign::read.dta)) men<-update(men, sex=1) women<-update(women,sex=0) all<-rbind(men,women) all<-update(all, drinkreg=as.numeric(drkfre)>2) all