I am trying to compare the distribution of a continuous variable by a categorical variable (water quality by setting). I want to compare 3 different datasets because they have a different number of observations.
I tried using the code below found at https://stackoverflow.com/questions/19483211/i-want-to-put-3-boxplots-from-3-different-datasets-into-one-graph-in-r but it did not work and I think it's because I want to look at a continuous variable by another variable. The point of wanting to visualize it this way is to see how the datasets compare in their distribution at each category.
boxplot(aerobic1, at = 1, xlim = c(0.5, 3.5), ylim = range(c(aerobic1, aerobic2, aerobic3))) boxplot(aerobic2, at = 2, add = TRUE) boxplot(aerobic3, at = 3, add = TRUE)
What is the best way to do this? or am I missing something from the code above?