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ggrounded

ggrounded creates bar plots with rounded corners using ggplot2.

Installation

Install the released version of ggrounded from CRAN:

install.packages("ggrounded")

Or install the development version from GitHub with:

# install.packages("pak")
pak::pak("botan/ggrounded")

Usage

There are two types of bar charts in ggplot2: geom_bar() and geom_col(). geom_bar_rounded() and geom_col_rounded() are wrappers on them for rounding the top corners. geom_bar_rounded() makes the height of the bar proportional to the number of cases in each group (or if the weight aesthetic is supplied, the sum of the weights).

The radius argument is a normalized value between 0 and 1. Use 0 for square corners and 1 for the maximum rounding that each bar can safely support based on its own width and height.

library(ggrounded)
library(ggplot2)

ggplot(mpg, aes(class)) +
  geom_bar_rounded()

If you want the heights of the bars to represent values in the data, use geom_col_rounded() instead.

ggplot(data.frame(x = letters[1:3], y = c(2.3, 1.9, 3.2)), aes(x, y)) +
  geom_col_rounded()

Use larger radius values when you want a more pronounced rounded top:

ggplot(data.frame(x = letters[1:3], y = c(2.3, 1.9, 3.2)), aes(x, y)) +
  geom_col_rounded(radius = 1)

Histograms can use rounded bins with geom_histogram_rounded():

ggplot(faithful, aes(waiting)) +
  geom_histogram_rounded(bins = 10)
#> Warning: The `drop` argument of `stat_bin()` is deprecated as of ggplot2 2.1.0.
#> ℹ Please use the `pad` argument instead.
#> This warning is displayed once every 8 hours.
#> Call `lifecycle::last_lifecycle_warnings()` to see where this warning was
#> generated.

Negative values are supported too. Bars above zero keep rounded top corners, while bars below zero round away from the baseline:

ggplot(data.frame(x = letters[1:4], y = c(2.3, -1.9, 3.2, -2.6)), aes(x, y)) +
  geom_hline(yintercept = 0, linetype = "dotted") +
  geom_col_rounded()

Code of Conduct

Please note that the ggrounded is released with a contributor code of conduct. By contributing in this project you agree to abide by its terms.

License

This package is released under the MIT License.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.