I have a data frame that has two columns named celltype1 and celltype2. I would like to make a scatterplot for the data frame in which the x-axis is celltype1 and the y-axis is celltype2. The desired plot is that celltype1 has a specific color and celltype2 has another color. How can I assign a color to each of them? because right now with the below code all points in the scatter plots are black and I cant recognize the groups.
please see the attached images (data frame and the output ).
plot1 = ggplot(N, aes(x = group1, y = group2, ???? ))+ geom_point()