mice (version 3.13.0)

complete.mids: Extracts the completed data from a mids object


Takes an object of class mids, fills in the missing data, and returns the completed data in a specified format.


# S3 method for mids
complete(data, action = 1L, include = FALSE, mild = FALSE, ...)



An object of class mids as created by the function mice().


A numeric vector or a keyword. Numeric values between 1 and data$m return the data with imputation number action filled in. The value of action = 0 return the original data, with missing values. action can also be one of the following keywords: "all", "long", "broad" and "repeated". See the Details section for the interpretation. The default is action = 1L returns the first imputed data set.


A logical to indicate whether the original data with the missing values should be included.


A logical indicating whether the return value should always be an object of class mild. Setting mild = TRUE overrides action keywords "long", "broad" and "repeated". The default is FALSE.

Additional arguments. Not used.


Complete data set with missing values replaced by imputations. A data.frame, or a list of data frames of class mild.


The argument action can be length-1 character, which is matched to one of the following keywords:


produces a mild object of imputed data sets. When include = TRUE, then the original data are appended as the first list element;


produces a data set where imputed data sets are stacked vertically. The columns are added: 1) .imp, integer, referring the imputation number, and 2) .id, character, the row names of data$data;


same as "long" but without the two additional columns;


produces a data set with where imputed data sets are stacked horizontally. Columns are ordered as in the original data. The imputation number is appended to each column name;


same as "broad", but with columns in a different order.

See Also

mice, mids


Run this code
# obtain first imputed data set
imp <- mice(nhanes2, print = FALSE, maxit = 1)
dat <- complete(imp)

# obtain stacked third and fifth imputation
dat <- complete(imp, c(3, 5))

# obtain all datasets, with additional identifiers
head(complete(imp, "long"))

# same, but now as list, mild object
dslist <- complete(imp, "all")

# same, but also include the original data
dslist <- complete(imp, "all", include = TRUE)

# select original + 3 + 5, store as mild
dslist <- complete(imp, c(0, 3, 5), mild = TRUE)
# }

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