UVA_PAR: Calculate UVA:PAR photon ratio from spectral irradiance.
Description
This function returns the UVA:PAR photon ratio of a light source
spectrum.
Usage
UVA_PAR(spct, std = "ISO", use.cached.mult = FALSE, use.hinges = TRUE)
Arguments
spct
an object of class "source.spct"
std
select which definition of UVA should be used,
defaults to "ISO"
use.cached.mult
logical indicating whether multiplier values should be
cached between calls
use.hinges
logical indicating whether to use hinges to reduce
interpolation errors
Value
a single numeric nondimensional value giving the UVA:PAR photon ratio,
with name attribute set to the name of the wavebands, with "(q:q)"
appended.