1. Introduction

ggstar provides geoms for ggplot2 to create more easily discernible shapes:

geom_star

p1 <- show_starshapes()
p1

And the default is: c(1, 13, 15, 11, 12, 14, 29, 2, 27)[seq_len(n)]. n is the number of shapes you want to use.

2. Install

ggstar has been submitted on CRAN, you can use the following to install it.

# Release
install.packages("ggstar")

# Or for devel
if(!requireNamespace("remotes", quietly=TRUE)){
    install.packages("remotes")
}
remotes::install_github("xiangpin/ggstar")

3. Usage

geom_star is similar to geom_point of ggplot2. The difference point is geom_star use starshape to mapping the starshapes. The another is geom_star use scale_starshape_manual for manual scale. And the shapes will be not distorted on cartesian coordinates or polar coordinates.

library(ggplot2)
library(ggstar)
p2 <- ggplot(data=iris, aes(x=Sepal.Width,y=Sepal.Length)) + 
      geom_star(aes(starshape=Species, fill=Species), size=2.5) +
      scale_fill_manual(values=c("#E41A1C", "#377EB8", "#4DAF4A")) +
      theme(legend.spacing.y = unit(0.02, "cm"))
p2

p3 <- ggplot(data=mtcars, aes(x=wt, y=mpg)) +
      geom_star(aes(fill=cyl), size=2.5) +
      scale_fill_gradient(low="blue", high="red") +
      coord_polar() +
      theme(panel.border=element_blank(),
            legend.spacing.y = unit(0.02, "cm"))
p3

4. Need helps?

If you have questions/issues, please visit github issue tracker.

5. Session information

Here is the output of sessionInfo() on the system on which this document was compiled:

## R version 4.4.1 (2024-06-14)
## Platform: x86_64-pc-linux-gnu
## Running under: Ubuntu 24.04.1 LTS
## 
## Matrix products: default
## BLAS:   /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3 
## LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/libopenblasp-r0.3.26.so;  LAPACK version 3.12.0
## 
## locale:
##  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
##  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=C              
##  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
##  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
##  [9] LC_ADDRESS=C               LC_TELEPHONE=C            
## [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       
## 
## time zone: Etc/UTC
## tzcode source: system (glibc)
## 
## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     
## 
## other attached packages:
## [1] ggstar_1.0.4.002 ggplot2_3.5.1    prettydoc_0.4.1 
## 
## loaded via a namespace (and not attached):
##  [1] vctrs_0.6.5       cli_3.6.3         knitr_1.48        rlang_1.1.4      
##  [5] xfun_0.49         highr_0.11        jsonlite_1.8.9    labeling_0.4.3   
##  [9] glue_1.8.0        colorspace_2.1-1  buildtools_1.0.0  htmltools_0.5.8.1
## [13] maketools_1.3.1   gridExtra_2.3     sys_3.4.3         sass_0.4.9       
## [17] fansi_1.0.6       scales_1.3.0      rmarkdown_2.28    grid_4.4.1       
## [21] tibble_3.2.1      evaluate_1.0.1    munsell_0.5.1     jquerylib_0.1.4  
## [25] fastmap_1.2.0     yaml_2.3.10       lifecycle_1.0.4   compiler_4.4.1   
## [29] pkgconfig_2.0.3   farver_2.1.2      digest_0.6.37     R6_2.5.1         
## [33] utf8_1.2.4        pillar_1.9.0      magrittr_2.0.3    bslib_0.8.0      
## [37] withr_3.0.2       tools_4.4.1       gtable_0.3.6      cachem_1.1.0