ez-package: Easy analysis and visualization of factorial experiments

In ez: Easy Analysis and Visualization of Factorial Experiments

Easy analysis and visualization of factorial experiments

Description

This package facilitates easy analysis of factorial experiments, including purely within-Ss designs (a.k.a. “repeated measures”), purely between-Ss designs, and mixed within-and-between-Ss designs. The functions in this package aim to provide simple, intuitive and consistent specification of data analysis and visualization. Visualization functions also include design visualization for pre-analysis data auditing, and correlation matrix visualization. Finally, this package includes functions for non-parametric analysis, including permutation tests and bootstrap resampling. The bootstrap function obtains predictions either by cell means or by more advanced/powerful mixed effects models, yielding predictions and confidence intervals that may be easily visualized at any level of the experiment's design.

Details

Package:	ez
Type:	Package
Version:	4.5-0
Date:	2016-11-01
License:	GPL-3
LazyLoad:	yes

This package contains several useful functions:

ezANOVA

Provides simple interface to ANOVA, including assumption checks.

ezBoot

Computes bootstrap resampled cell means or lmer predictions

ezCor

Function to plot a correlation matrix with scatterplots, linear fits, and univariate density plots

ezDesign

Function to plot a visual representation of the balance of data given a specified experimental design. Useful for diagnosing missing data issues.

ezMixed

Provides assessment of fixed effects in a mixed effects modelling context.

ezPerm

Provides simple interface to the Permutation test.

ezPlot

Uses the ggplot2 graphing package to generate plots for any given user-requested effect, by default producing error bars that facilitate visual post-hoc multiple comparisons.

ezPlot2

When supplied the results from a call to ezPredict or ezBoot, plots predictions with confidence intervals.

ezPrecis

Provides a summary of a given data frame.

ezPredict

Computes predicted values from the fixed effects of a mixed effects model.

ezResample

Resamples data, useful when bootstrapping.

ezStats

Provides between-Ss descriptive statistics for any given user-requested effect.

This package also contains two data sets:

ANT

Simulated data from the Attention Network Test

ANT2

Messy version of the ANT data set

Author(s)

Michael A. Lawrence [e-mail]
Visit the ez development site at https://github.com/mike-lawrence/ez
for the bug/issue tracker and the link to the mailing list.

See Also

ANT, ANT2, ezANOVA, ezBoot, ezCor, ezDesign, ezMixed, ezPerm, ezPlot, ezPlot2, ezPrecis, ezPredict, ezResample, ezStats

ez documentation built on Feb. 16, 2026, 5:06 p.m.