Investigating New Projection Pursuit Index Functions R package spinebil version 1.0.5 Projection pursuit is used to find interesting low-dimensional projections of high-dimensional data by optimizing an index over all possible projections. The 'spinebil' package contains methods to evaluate the performance of projection pursuit index functions using tour methods. A paper describing the methods can be found at <doi:10.1007/s00180-020-00954-8>. Software Depends: R (>= 4.1.0) Imports: tourr, ggplot2, tibble, stats, dplyr, tidyr, tictoc, cassowaryr, rlang Suggests: minerva, testthat, purrr, furrr, future, quarto, knitr Tina Rashid Jafari <tina.rashidjafari@gmail.com> Comprehensive R Archive Network (CRAN) Ursula Laa [aut] (ORCID: <https://orcid.org/0000-0002-0249-6439>), Dianne Cook [aut] (ORCID: <https://orcid.org/0000-0002-3813-7155>), Tina Rashid Jafari [aut, cre] (ORCID: <https://orcid.org/0009-0008-3605-5341>) GPL-3 2025-10-17 application/tgz https://CRAN.R-project.org/package=spinebil doi:10.32614/CRAN.package.spinebil