Software

Statistics

Amelia II : (Project Webpage) (2004-present; James Honaker, Gary King, Mathew Blackwell) This software package provides "multiple imputations" of missing values in datasets, such as survey data, cross-section and times series cross-section. The algorithm we have developed algorithms for missing data, EMB, can work over a larger number of variables, has excellent numerical stability, and implements a unique set of prior over observations for incorperation expert knowledge about missing values. This package runs as a stand alone version with its own interface, or as a library for R.

Amelia : (Project Webpage) (1998-2003; James Honaker, Gary King, Anne Joseph, Ken Scheve, Naunihal Singh) This is an earlier version of the Amelia software package with a different imputation algorithm, EMis. This has a stand alone Windows version and a version in the GAUSS language.

Game Theory

ev.r: (Software | Instructions | Example Output ) This is a stand alone interface that will trace out flow diagrams for evolutionary models. The code assumes a discrete replicator dynamic evolving three types in the population. Users enter a fitness matrix and a series of initial population locations. The code requires the R package to operate.

Other

Here are a couple of pedagogical pieces demonstrating concepts from classes:

roc_animation.r: (code | snapshot) A moving plot that demonstrates how a Receiver Operating Characteristic (ROC) curve traces out as one moves the point of integration of the correctly and falsely classified objects. Runs in R.

loess_animation.r: (code | snapshot) A moving plot that demonstrates how a locally weighted regression (LOESS) curve traces out over a scatterplot. Also plots all the piecewise functions of a spline with two knot points as comparison. Runs in R.

Some other code examples are available on this class webpage.

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