Photobiological Calculations R package photobiology version 0.14.2 Definitions of classes, methods, operators and functions for use in photobiology and radiation meteorology and climatology. Calculation of effective (weighted) and not-weighted irradiances/doses, fluence rates, transmittance, reflectance, absorptance, absorbance and diverse ratios and other derived quantities from spectral data. Local maxima and minima: peaks, valleys and spikes. Conversion between energy-and photon-based units. Wavelength interpolation. Colours and vision. This package is part of the 'r4photobiology' suite, Aphalo, P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>. Software Depends: R (>= 4.1.0), SunCalcMeeus (>= 0.1.3) Imports: stats, grDevices, polynom (>= 1.4-1), tibble (>= 3.2.0), stringr (>= 1.4.0), lubridate (>= 1.9.4), caTools (>= 1.18.0), plyr (>= 1.8.9), dplyr (>= 1.1.4), tidyr (>= 1.3.1), splus2R (>= 1.3-3), zoo (>= 1.8-12), rlang (>= 1.1.4) Suggests: knitr (>= 1.48), rmarkdown (>= 2.27), testthat (>= 3.2.1), roxygen2 (>= 7.3.2), lutz (>= 0.3.2), covr (>= 3.6.0) Pedro J. Aphalo <pedro.aphalo@helsinki.fi> Comprehensive R Archive Network (CRAN) Pedro J. Aphalo [aut, cre] (ORCID: <https://orcid.org/0000-0003-3385-972X>), Titta K. Kotilainen [ctb] (ORCID: <https://orcid.org/0000-0002-2822-9734>), Glenn Davis [ctb], Agnese Fazio [ctb] GPL (>= 2) 2026-03-15 application/tgz https://CRAN.R-project.org/package=photobiology doi:10.32614/CRAN.package.photobiology