Applied Data Visualization with R and ggplot2

Using Density Plots

In this section, we'll use density plots to compare loan distributions for different credit grades. 

1. Use the loan data and plot a histogram for the loan amounts. Subdivide it into the different grades, as follows:

ggplot(df3,aes(x=loan_amnt)) + geom_histogram() + facet_ wrap(~grade)

Take a look at the following output screenshot:

2. We cannot see the shapes of the E, F, and G grades very clearly. Also, all of the grades have different histogram counts. Let's use a density plot to compare them, as follows:

ggplot(df3,aes(x=loan_amnt)) + geom_density() + facet_wrap(~grade)

Take a look at the following output screenshot: ...