arcET

In some cases, the polar-coordinate plot in ‘ggplot2’ are not flexible enough to meet actual needs. In contrast, the ‘circlize’ package is flexible enough, but too complex for beginners. This package provides a compromise solution that helps beginners to draw fast and well, and also allows advanced users to use flexibly.

Installation

You can install the development version of arcET like so:

## install.packages("devtools")
devtools::install_github("Hy4m/arcET", force = TRUE)

Example

This is a basic example which shows you how to solve a common problem:

library(arcET)
library(ggplot2)

## ggplot2 plot
ggplot(mtcars, aes(wt, mpg)) + geom_point()

## transform
arc_test()
#> Build CellID_1 plot......[1/1]

library(arcET)
library(ggplot2)

## ggplot2 plot
p <- ggplot(mtcars, aes(wt, mpg)) + geom_point()

arcplot() |>
  init_cell(p, region = CELL(180, 0, 0.5)) |>
  within_plot(title = "wt vs mpg",
              xlim = c(-1.1, 1.1),
              ylim = c(-0.1, 1.1)) |>
  decorate_rect(ymin = 1,
                ymax = 1.1,
                fill = "steelblue",
                colour = NA,
                CellID = "CellID",
                fixed = FALSE) |>
  decorate_bannertext(label = "Bannertext annotation has done",
                      y = 1.05,
                      colour = "red",
                      CellID = "CellID",
                      fixed = FALSE)
#> Build CellID_2 plot......[1/1]

region parameter

The region parameter (created by CELL() function) is used to set the region location in polar coordinates, and it mainly has the following four parameters: start and end are used to set the angle (in degree) position of the start and end of the region; r0 and r1 are used to set the radius of the start and end of the region. In addition, the direct parameter controls the direction of the region. The default of direct parameter is clockwise, but you can set to reverse.clockwise.

The show_cell() function is a quick way to visualize what different parameters do:

region <- CELL(start = 120, end = 60, r0 = 0.5, r1 = 1)

region ## print
#> 
#> ── --------CELLMETA information:-------- ───────────────────────────────────────
#> start -> 120 (in degree)
#> end -> 60 (in degree)
#> r0 -> 0.5 (in [0, 1])
#> r1 -> 1 (in [0, 1])
#> direct -> clockwise ('clockwise' or 'reverse.clockwise')
#> x.range -> [120, 60]
#> y.range -> [0.5, 1]
#> clip -> <function>
#> 
#> 
#> ── ------------------------------------ ────────────────────────────────────────
show_cell(region) ## visualize

## reverse.clockwise
region2 <- CELL(start = 120, end = 60, r0 = 0.5, r1 = 1,
                direct = "reverse.clockwise")
show_cell(region2)

## combine
show_cell(CELL(start = 120, end = 60, r0 = 0.5, r1 = 1),
          CELL(start = 140, end = 40, r0 = 0.5, r1 = 1,
               direct = "reverse.clockwise"))

Notes

It is still in the phase of code testing and updating help documentation, so many features and usage you may not be able to find the corresponding documentation. In addition, arcET currently does not support the special layer functions provided in other ggplot2 extensions, and of course I welcome everyone to submit PR to improve the arcET package.

Finally, it must be noted that many functions in the arcET package refer to or copy the corresponding function code in the ggplot2 package, and if I did not comment clearly in the source code, please point out or submit an PR to fix it.