Ggmulti

Package ggmulti is an extension of package ggplot2 by providing high dimensional visualization materials, such as

• Serialaxes coordinate (i.e. parallel, radial)

• Variety glyphs on scatterplot.

• “More general” geom_histogram and geom_density

Try

library(ggmulti)
ggplot(iris, 
       mapping = aes(Sepal.Length = Sepal.Length,
                     Sepal.Width = Sepal.Width,
                     Petal.Length = Petal.Length,
                     Petal.Width = Petal.Width,
                     colour = Species)) +
  geom_path(alpha = 0.2) +
  geom_histogram(mapping = aes(fill = Species), alpha = 0.5) + 
  coord_serialaxes()