R: Multiply imputed repeated analyses ('mira')

mira-class {mice} | R Documentation

## Multiply imputed repeated analyses (`mira`)

### Description

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.

### Details

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"`.

### Slots

#'

`.Data`:

  Object of class `"list"` containing the following slots:

`call`:

  The call that created the object.

`call1`:

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

`nmis`:

  An array containing the number of missing observations per column.

`analyses`:

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

### Author(s)

Stef van Buuren, Karin Groothuis-Oudshoorn, 2000

### References

van Buuren S and Groothuis-Oudshoorn K (2011). `mice`: Multivariate Imputation by Chained Equations in `R`. Journal of Statistical Software, 45(3), 1-67. https://www.jstatsoft.org/v45/i03/

### See Also

`with.mids`, `mids`, `mipo`

[Package mice version 3.13.0 Index]