how to run a two-way anova in r in r

To run a two-way ANOVA in R, you can use the aov() function. Here is an example using a dataset called "mydata" with two categorical variables, "factor1" and "factor2", and a continuous response variable, "response":

main.r
my_model <- aov(response ~ factor1 * factor2, data = mydata)
summary(my_model)
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In this case, we are specifying a full factorial model with an interaction term between the two factors (specified using the * symbol). You can also run a main effects-only model by removing the interaction term. The summary() function will output the ANOVA table, which includes F-statistics, p-values, and other relevant information.