> library(gridExtra)
> price1 = data$oil > price2 = data$product
> date = data$date
> p1 = qplot(date,price1) > p2 = qplot(date,price2)
> grid.arrange(p1,p2)
Using gridExtra to Graph Multiple ggplot2 Plots
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> library(gridExtra)
> price1 = data$oil > price2 = data$product
> date = data$date
> p1 = qplot(date,price1) > p2 = qplot(date,price2)
> grid.arrange(p1,p2)