Multivariate Expectation-Maximization (EM) based imputation framework that offers several different algorithms. These include regularisation methods like Lasso and Ridge regression, tree-based models and dimensionality reduction methods like PCA and PLS.
imputeR is an R package that provides a general framework for missing values imputation based on automated variable selection.
The main function impute
inputs a matrix containing missing values and returns a complete data matrix using the variable selection functions provided as part of the package, or written by the user.
The package also offers many useful tools for imputation research based on impute
. For example, the Detect
function can be used to detect the variables' type in a given data matrix. guess
can be used for naive imputation such as mean imputation, median imputation, majority imputation (for categorical variables only) and random imputation. SimIm
function stands for "simulation for imputation". It accepts a complete matrix and randomly introduce some percentage of missing values into the matrix so imputation methods can be employed subsequently to impute this artificial missing data matrix. Because the true values are actually know so imputation accuracy can be easily calculated. This calls for the SimEval
function that extends SimIm
function, simulates a number of missing data matrices, applies a imputation method to these missing matrices and evaluate its performance. This enables the uncertainty of the imputation method to be obtained.
You can cite imputeR the following: General Multivariate Imputation Framework_. R package version 2.1, <URL: https://CRAN.R-project.org/package=imputeR>.
2.1
GPL-3
Changes to remain on CRAN and comply with CRAN policy
Changed NEWS file to markup document
Bugfix for glmboostR
Improved Examples for most of the functions
Moved several packages from depends to suggests
Removed some suggests e.g. cutoffR
Changed NEWS file to markup document
Replaced dontrun with donttest for long running examples
Description file: Improved package name and description
Minor Readme updates
Changed version numbering from 2.0.0 to the simpler 2.0
Added a NEWS file
Maintainer change
Added citation file - citation("imputeR") returns now information on how to cite imputeR
Activated LazyData in Description file
Added automated testing via testthat
License change form GPL-2 to GPL-3
Internal code base changes
Readme updates
Added first testthat testing case