gf_density()

The gf_density() function will overlay a density plot onto a density histogram (i.e., gf_dhistogram(), not gf_histogram()). The density plot is a smoothed out version of the distribution. They can be helpful when you want to get a better idea of the approximate shape of the distribution (e.g., normal, bimodal, skewed, uniform).

Example 1:

# A density plot chained onto a density histogram

gf_dhistogram(~Thumb, data = Fingers) %>%

gf_density()

Example of output from running the code above:

Example 2:

# A density plot with color arguments, chained onto a faceted density histogram

gf_dhistogram(~Thumb, data = Fingers, fill = "grey", color = "black") %>%

gf_facet_grid(Gender ~ .) %>%

gf_density(color = "red", fill = "blue")

Example of output from running the code above: