ggplot2 Basics

Bharani Akella has an introduction to ggplot2:

Plot10: Scatter-plot

ggplot(data = mtcars,aes(x=mpg,y=hp,col=factor(cyl)))+geom_point()
  • mpg(miles/galloon) is assigned to the x-axis

  • hp(Horsepower) is assigned to the y-axis

  • factor(cyl) {Number of cylinders} determines the color

  • The geometry used is scatter plot. We can create a scatter plot by using the geom_point() function.

He has a number of similar examples showing several variations on bar, line, and scatterplot charts.

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