photobiology: Photobiological Calculations

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. Astronomical calculations related solar angles and day length. Colours and vision. This package is part of the 'r4photobiology' suite, Aphalo, P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>.

Version: 0.10.10
Depends: R (≥ 3.6.0)
Imports: stats, polynom (≥ 1.4-0), tibble (≥ 3.0.4), stringr (≥ 1.4.0), lubridate (≥ 1.7.8), plyr (≥ 1.8.4), dplyr (≥ 1.0.2), tidyr (≥ 1.1.2), splus2R (≥ 1.2-2), zoo (≥ 1.8-8), rlang (≥ 0.4.8)
Suggests: knitr (≥ 1.30), rmarkdown (≥ 2.4), testthat (≥ 2.3.2), roxygen2 (≥ 7.1.1)
Published: 2022-03-25
Author: Pedro J. Aphalo ORCID iD [aut, cre], Titta K. Kotilainen ORCID iD [ctb], Glenn Davis [ctb], Agnese Fazio [ctb]
Maintainer: Pedro J. Aphalo <pedro.aphalo at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
Citation: photobiology citation info
Materials: README NEWS
CRAN checks: photobiology results


Reference manual: photobiology.pdf
Vignettes: User Guide: 1 Radiation
User Guide: 2 Astronomy and Atmosphere


Package source: photobiology_0.10.10.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): photobiology_0.10.10.tgz, r-oldrel (arm64): photobiology_0.10.10.tgz, r-release (x86_64): photobiology_0.10.10.tgz, r-oldrel (x86_64): photobiology_0.10.10.tgz
Old sources: photobiology archive

Reverse dependencies:

Reverse depends: ggspectra, photobiologyFilters, photobiologyInOut, photobiologyLamps, photobiologyLEDs, photobiologyPlants, photobiologySensors, photobiologySun, photobiologyWavebands
Reverse imports: afthd


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