mice (version 3.16.0)

mira-class: Multiply imputed repeated analyses (mira)


The mira object is generated by the with.mids() function. The as.mira() function takes the results of repeated complete-data analysis stored as a list, and turns it into a mira object that can be pooled.




Object of class "list" containing the following slots:


The call that created the object.


The call that created the mids object that was used in call.


An array containing the number of missing observations per column.


A list of m components containing the individual fit objects from each of the m complete data analyses.


Stef van Buuren, Karin Groothuis-Oudshoorn, 2000


In versions prior to mice 3.0 pooling required only that coef() and vcov() methods were available for fitted objects. This feature is no longer supported. The reason is that vcov() methods are inconsistent across packages, leading to buggy behaviour of the pool() function. Since mice 3.0+, the broom package takes care of filtering out the relevant parts of the complete-data analysis. It may happen that you'll see the messages like No method for tidying an S3 object of class ... or Error: No glance method for objects of class .... The royal way to solve this problem is to write your own glance() and tidy() methods and add these to broom according to the specifications given in https://broom.tidymodels.org.

#'The mira class of objects has methods for the following generic functions: print, summary.

Many of the functions of the mice package do not use the S4 class definitions, and instead rely on the S3 list equivalent oldClass(obj) <- "mira".


van Buuren S and Groothuis-Oudshoorn K (2011). mice: Multivariate Imputation by Chained Equations in R. Journal of Statistical Software, 45(3), 1-67. tools:::Rd_expr_doi("10.18637/jss.v045.i03")

See Also

with.mids, mids, mipo