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Alex Rivera
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Is aov appropriate for unbalanced datasets. According to help ...provides a wrapper to lm for fitting linear models to balanced or unbalanced experimental designs . But later on it says aov is designed for balanced designs, and the results can be hard to interpret without balance . How should I perform a 2-way anova on an unbalanced dataset in R? I would like to reproduce the different results for type I and type III sum of squares of SAS output (when using proc glm ). I remember we were using type III sum of squares for unbalanced datasets. Thank you in advance.
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