Faceting

When performing data exploration, it is essential to compare data across different groups. Faceting is a technique that enables the user to create graphs for subsets of data. In this recipe, we demonstrate how to use the facet function to create a chart for multiple subsets of data.

Getting ready

Ensure you have completed the previous steps by storing sample_sum in your R environment.

How to do it…

Please perform the following steps to create a chart for multiple subsets of data:

1. First, use the facet_wrap function to create multiple subplots by using the Province variable as the condition:

   > g <- ggplot(data=sample_sum, mapping=aes(x=Year_Month, y=Total_Sales, colour = Province ))
   >  g+geom_point(size = 5) +  facet_wrap(~Province) + ggtitle('Create Multiple Subplots by Province')
   

   

   Figure 19: Create multiple subplots by province

2. On the other hand, we can change the layout of the plot in a vertical direction if we set the number of columns to 1:

   > g+geom_point() +  facet_wrap...