I'm very new with R and stats in general, but I need to make a scatterplot that I think might be beyond its native capacities.
I have a couple of vectors of observations and I want to make a scatterplot with them, and each pair falls into one out of three categories. I would like to make a scatterplot that separates each category, either by colour or by symbol. I think this would be better than generating three different scatterplots.
I have another problem with the fact that in each of the categories, there are large clusters at one point, but the clusters are larger in one group than in the other two.
Does anyone know a good way to do this? Packages I should install and learn how to use? Anyone done something similar?