#activate the package
library(ggplot2)

#load the dataframe
y <- c(45,12,48,79,65,32,78,95,12,75)
x <- c(1,2,3,4,5,6,7,8,9,10)
my.dataframe<-data.frame(y,x)
my.dataframe

#draw the simplest plot ever with ggplot()
ggplot(my.dataframe, aes(x,y)) + geom_point()


#same plot,  with larger, blue dots
ggplot(my.dataframe, aes(x,y)) +
  geom_point(size=3, colour="blue")

#same plot,  with larger, blue triangles
ggplot(my.dataframe, aes(x,y)) +
  geom_point(size=5, colour="blue", shape=17)