Amelia v1.7.4

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A Program for Missing Data

A tool that "multiply imputes" missing data in a single cross-section (such as a survey), from a time series (like variables collected for each year in a country), or from a time-series-cross-sectional data set (such as collected by years for each of several countries). Amelia II implements our bootstrapping-based algorithm that gives essentially the same answers as the standard IP or EMis approaches, is usually considerably faster than existing approaches and can handle many more variables. Unlike Amelia I and other statistically rigorous imputation software, it virtually never crashes (but please let us know if you find to the contrary!). The program also generalizes existing approaches by allowing for trends in time series across observations within a cross-sectional unit, as well as priors that allow experts to incorporate beliefs they have about the values of missing cells in their data. Amelia II also includes useful diagnostics of the fit of multiple imputation models. The program works from the R command line or via a graphical user interface that does not require users to know R.

Readme

Amelia II

Amelia II is an R package for the multiple imputation of multivariate incomplete data. It uses an algorithm that combines bootstrapping and the EM algorithm to take draws from the posterior of the missing data. The Amelia package includes normalizing transformations, cell-level priors, and methods for handling time-series cross-sectional data.

How to install

Installation requirements

Amelia requires R version 2.14.0 or higher.

Manual installation

install.packages("Amelia")

Installing unstable developer version:

require(devtools)
install_github("IQSS/Amelia", ref = "develop")

Functions in Amelia

Name Description
africa Economic and Political Indictors in 6 African States
compare.density Compare observed versus imputed densities
write.amelia Write Amelia imputations to file
amelia-package Amelia II: A Program for Missing Data
summary.amelia Summary of an Amelia object
transform.amelia Transform imputed datasets from Amelia objects
ameliabind Combine multiple runs of Amelia
combine.output Combine Multiple Amelia Output Lists
overimpute Overimputation diagnostic plot
plot.amelia Summary plots for Amelia objects
disperse Overdispersed starting values diagnostic for multiple imputation
missmap Missingness Map
amelia AMELIA: Multiple Imputation of Incomplete Multivariate Data
freetrade Trade Policy and Democracy in 9 Asian States
tscsPlot Plot observed and imputed time-series for a single cross-section
moPrep Prepare Multiple Overimputation Settings
AmeliaView Interactive GUI for Amelia
mi.meld Combine Multiple Results From Multiply Imputed Datasets
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Vignettes of Amelia

Name
auto/amelia.el
Makefile
amelia.Rnw
amelia.bib
context-menu.png
diag.png
distpri.png
import.png
index.shtml
main.png
numopts.png
options.png
output-log.png
rangepri.png
splash.png
utf8.def
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Details

Date 2015-12-05
LinkingTo Rcpp (>= 0.11), RcppArmadillo
License GPL (>= 2)
URL http://gking.harvard.edu/amelia
NeedsCompilation yes
Packaged 2015-12-06 03:04:13 UTC; mblackwell
Repository CRAN
Date/Publication 2015-12-06 13:31:55

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