afex-package: Analysis of Factorial Experiments.
Description
Analysis of Factorial Experiments.Details
ll{ Package: afex
Type: Package
Version: 0.2-26
Date: 2012-08-09
Depends:
R (>= 2.14.0), car, lme4, pbkrtest, reshape2,
stringr
Encoding: UTF-8
License: GPL
(>=3)
URL: http://www.psychologie.uni-freiburg.de/Members/singmann/R/afex
}
Provides convenience functions for analyzing factorial
experiments using ANOVA or mixed-models. Functions
ez.glm() and aov.car() allow convenient specification of
pure-between, pure-within (i.e., repeated-measures), and
mixed between-within (i.e., split-plot) ANOVAs and
ANCOVAs with type 2 and type 3 sums of squares for data
in the long format (i.e., one observation per row)
wrapping car::Anova() (aggregating more then one
observation per individual and cell of the design).
Function nice.anova() produces publication ready ANOVA
tables. Function mixed() fits a mixed model using
lme4::lmer() and computes p-values for all effects in the
model (using the Kenward-Rogers approximation of degrees
of freedom). afex uses type 3 sums of squares as default
(imitating commercial statistical software) and sets the
default contrasts to contr.sum.