Imports: stats, polynom (>= 1.4-0), tibble (>= 3.0.4), stringr (>=
Suggests: knitr (>= 1.30), rmarkdown (>= 2.4), testthat (>= 2.3.2),

Imports: stats, grDevices, polynom (>= 1.4-0), tibble (>= 3.0.4),

Imports: stats, grDevices, polynom (>= 1.4-1), tibble (>= 3.1.0),

Imports: stats, polynom (>= 1.4-0), tibble (>= 3.0.1), stringr (>=
Suggests: knitr (>= 1.28), rmarkdown (>= 2.2), testthat (>= 2.3.2),

Description: Definitions of classes, methods, operators and functions for use in
photobiology and radiation meteorology and climatology. Calculation of
transmittance, reflectance, absorptance, absorbance and diverse
ratios and other derived quantities from spectral data. Local maxima and
minima. Conversion between energy- and photon-based units. Wavelength
interpolation. Astronomical calculations related solar angles and day
Imports: tibble (>= 1.1), lubridate (>= 1.5.6), plyr (>= 1.8.4), dplyr
Suggests: knitr (>= 1.14), rmarkdown (>= 1.0), testthat (>= 1.0.2),

Imports: tibble (>= 1.2), lubridate (>= 1.6.0), plyr (>= 1.8.4), dplyr
Suggests: knitr (>= 1.14.4), rmarkdown (>= 1.1), testthat (>= 1.0.2),

person("Titta K.", "Kotilainen", role = "ctb")
Imports: polynom (>= 1.3-8), tibble (>= 1.2), lubridate (>= 1.6.0),
Suggests: knitr (>= 1.15.1), rmarkdown (>= 1.2), testthat (>= 1.0.2),

Imports: polynom (>= 1.3-9), tibble (>= 1.2), lubridate (>= 1.6.0),
Suggests: knitr (>= 1.15.1), rmarkdown (>= 1.3), testthat (>= 1.0.2),

Imports: stats, polynom (>= 1.3-9), tibble (>= 1.2), lubridate (>=

Imports: stats, polynom (>= 1.3-9), tibble (>= 1.3.3), lubridate (>=
Suggests: knitr (>= 1.16), rmarkdown (>= 1.6), testthat (>= 1.0.2),

Suggests: knitr (>= 1.17), rmarkdown (>= 1.6), testthat (>= 1.0.2),

Imports: stats, polynom (>= 1.3-9), tibble (>= 1.3.4), lubridate (>=
Suggests: magrittr (>= 1.5), knitr (>= 1.17), rmarkdown (>= 1.8),

person("Pedro J.", "Aphalo", email = "pedro.aphalo@helsinki.fi", role = c("aut", "cre"), comment = c(ORCID = "https://orcid.org/0000-0003-3385-972X")),
length. Colours and vision. This package is part of the