continuous_to_discrete.R

# Make Example Graph/Data

a <- data.frame(firstcolumn=seq(1:10), secondcolumn=seq(21:30), thirdcolumn=seq(41:50))

ggplot()+
  geom_point(data=a, aes(x=firstcolumn, y=secondcolumn, fill=thirdcolumn))


# One method is to make the column a character instead of a number, than it treats it as discrete

a$thirdcolumn <- as.character(a$thirdcolumn)

ggplot()+
  geom_point(data=a, aes(x=firstcolumn, y=secondcolumn, fill=thirdcolumn))

# another option is to use scale_x_discrete (or scale_y_discrete) to tell it to use the fill as discrete

a <- data.frame(firstcolumn=seq(1:10), secondcolumn=seq(21:30), thirdcolumn=seq(41:50))

ggplot()+
  geom_point(data=a, aes(x=firstcolumn, y=secondcolumn, fill=thirdcolumn))+
  scale_x_discrete()