wrap.anova.planned: ANOVA (planned contrasts)

In michaelkardas/behavioralwrappers: Wrappers and other functions for the behavioral sciences

Description

Performs planned contrasts for a one-way, between-subjects ANOVA. This function assumes categorical (i.e., unordered) independent variables, fixed effects, and equal variance across conditions.

Usage

wrap.anova.planned(dv1, iv1, levels, weights)

Arguments

dv1	Column vector containing the dependent variable
iv1	Column vector containing the between-subjects independent variable
levels	String vector containing two or more factor levels of the independent variable
weights	Numeric vector containing the contrast weights. Must sum to +1 and -1.

Examples

## Contrast between two levels of the independent variable
wrap.anova.planned(dv1 = bdata$DV1, iv1 = bdata$IV2, levels = c("PhotoA", "PhotoB"),
weights = c(-1, 1))

## Contrast between three levels of the independent variable
wrap.anova.planned(dv1 = bdata$DV1, iv1 = bdata$IV2, levels = c("PhotoA", "PhotoB",
"PhotoC"), weights = c(-1, 0.5, 0.5))

michaelkardas/behavioralwrappers documentation built on Jan. 2, 2020, 7:46 a.m.