Changing aesthetics mapping

Aesthetics mapping describes how data variables are mapped to the visual property of a plot. In this recipe, we discuss how to modify aesthetics mapping on geometric objects.

Getting ready

Ensure you have installed and loaded ggplot2 into your R session. Also, you need to complete the previous steps by storing sample_sum in your R environment.

How to do it…

Please perform the following steps to add aesthetics to the plot:

1. First, create a scatterplot by mapping Year_Month to the x axis, Total_Sales to the y axis, and Province to color:

   > g <- ggplot(data=sample_sum, mapping=aes(x=Year_Month, y=Total_Sales, colour=Province)) + ggtitle('With geom_point')
   > g + geom_point()
   

2. Set the aesthetics mapping on the geometric object:

   > g2 <- ggplot(data=sample_sum) + geom_point(mapping=aes(x=Year_Month, y=Total_Sales, colour=Province)) + ggtitle('With Aesthetics Mapping')
   > g2
   

   

   Figure 4: Scatterplots using geom_point and aesthetics mapping

3. Adjust the point size...