Analysis of Variance
KEY:
ds = dataset you are currently using.
DV = dependent variable of interest
IV = independent variable of interest
Subject = name of subject number column
XYXY = dummy name for a variable, matrix, or data frame into which you are moving information.
Before performing ANOVA: Make your subjects and IVs into factors
Note that in ANOVA your independent variables and subject numbers (within-subjects data) need to be treated as discrete levels. R assumes that subject numbers are continuous. In order to tell it otherwise, use the factor function.
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ds$Subject <- as.factor(ds$Subject)
ds$IV <- as.factor(ds$IV)
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You can also use this command to add labels to your IVs if you desire
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ds$IV <- factor(ds$IV,
levels = c(0,1),
labels = c("Label for 0", "Label for 1"))
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