descriptionMeta: "This post introduces the concept of 2d density chart and explains how to build it with R and ggplot2. 2d histograms, hexbin charts, 2d distributions and others are considered." ...

In the R programming language, the de facto standard framework for drawing rectangular coordinates is ggplot2. The most important feature of ggplot2 is that it is object-oriented and uses the plus ...

Note the column name, mpg, is unquoted. That feature hasn’t been handy, though, if you want to write your own R functions using the tidyverse. That’s because base R functions usually need quoted ...