circus

The Circus of Monsters!

circus contains a variety fitted models to help the systematic testing of other packages.

Installation

Run the following:

install.packages("remotes")
remotes::install_github("easystats/circus")
library("circus")

How to use it

You could use the package in your testthat block by directly calling the models. However, the usual workflow is to directly download them from github with the download_model() function in the insight package:

test_that("my_function_works", {
  testthat::skip_if_not_installed("insight")
  testthat::skip_if_not_installed("curl") # to check internet access
  testthat::skip_if_offline()
  testthat::skip_if_not_installed("httr2") # to download stuff

  # model <- circus::lmerMod_1  # Local solution
  model <- insight::download_model("lmerMod_1")
  testthat::skip_if(is.null(model))
  testthat::expect_equal(myFunction(model), 0.333)
})

Contribute

Feel free to add any model you find missing! Any scary creature for the depth of your mind has its place here!

In order to add models, do the following:

1. Add your model-name in the usethis::use_data() function (last chunk) in the README.Rmd
2. Add documentation for your model in the R/data.R/ file
3. Now fit your model and save it to the data-folder, using usethis::use_data(<yourmodel>).
4. Check and build documentation for the package (to generate the .rd-files)
5. Upload following files to github: /data/<yourmodel.rda>, data.R and data.rd.

Note When you build or install the package, it is recommended to do so with following build-options: R CMD INSTALL --no-multiarch --with-keep.source --no-libs --no-data. Furthermore, when building the documentation, make sure to not build the vignettes.

Sample data

Illusion Game

# Data from Makowski et al., (2023) for the Illusion Game
df <- read.csv("https://raw.githubusercontent.com/RealityBending/IllusionGameValidation/refs/heads/main/data/study1.csv")
df <- df[c("Participant", "Illusion_Type", "Trial", "RT", "Error", "Illusion_Strength", "Illusion_Difference")]
df$RT <- df$RT / 1000
df <- df[df$Illusion_Strength > 0, ]
df <- df[df$Illusion_Type %in% c("Müller-Lyer", "Delboeuf", "Ebbinghaus", "Vertical-Horizontal", "Ponzo"), ]
write.csv(df, "../data/illusiongame.csv", row.names = FALSE)

How to add models

lm_1 <- lm(mpg ~ wt, data = mtcars)
usethis::use_data(lm_1, overwrite = TRUE)