2 Variable Plotting with ggplot2

In this lecture we will briefly show some examples of how you can compare two variables from a dataset. For these examples, you'll need the full control of ggplot instead of using qplot(), but we will show a quick example of what qplot is capable of. We'll use the built-in ggplot2 movies dataset:

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library(ggplot2)
df <- movies

qplot()

In [28]:
qplot(x=year, y=rating, data = df, geom = "density2d")
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In [6]:



    


pl <- ggplot(movies,aes(x = year,y=rating))























2d Bin Chart












In [7]:



    


pl + geom_bin2d()









































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# Control bin sizes
pl + geom_bin2d(binwidth=c(2,1))















































2d Density Plot












In [29]:



    


pl + geom_density2d()















































2d Hex Plot












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pl + geom_hex()









































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pl + geom_hex() + scale_fill_gradient(high='red',low='blue')















































Alright that's it for the basics of plotting 2 variables against each other!