Photo:photon ratio
This function gives the photon ratio between two given wavebands of a radiation spectrum.
photon_ratio(
w.length,
s.irrad,
w.band.num = NULL,
w.band.denom = NULL,
unit.in = "energy",
check.spectrum = TRUE,
use.cached.mult = FALSE,
use.hinges = getOption("photobiology.use.hinges", default = NULL)
)w.length |
numeric vector of wavelength (nm). |
s.irrad |
numeric vector of spectral (energy or photon) irradiances (W m-2 nm-1) or (mol s-1 m-2 nm-1). |
w.band.num |
waveband object used to compute the numerator of the ratio. |
w.band.denom |
waveband object used to compute the denominator of the ratio. |
unit.in |
character Allowed values "energy", and "photon", or its alias "quantum". |
check.spectrum |
logical Flag telling whether to sanity check input data, default is TRUE. |
use.cached.mult |
logical Flag telling whether multiplier values should be cached between calls. |
use.hinges |
logical Flag indicating whether to insert "hinges" into the spectral data before integration so as to reduce interpolation errors at the boundaries of the wavebands. |
a single numeric value giving the unitless ratio.
The default for both w.band parameters is a waveband covering
the whole range of w.length.
Other low-level functions operating on numeric vectors.:
as_energy(),
as_quantum_mol(),
calc_multipliers(),
div_spectra(),
energy_irradiance(),
energy_ratio(),
insert_hinges(),
integrate_xy(),
interpolate_spectrum(),
irradiance(),
l_insert_hinges(),
oper_spectra(),
photon_irradiance(),
photons_energy_ratio(),
prod_spectra(),
s_e_irrad2rgb(),
split_energy_irradiance(),
split_photon_irradiance(),
subt_spectra(),
sum_spectra(),
trim_tails(),
v_insert_hinges(),
v_replace_hinges()
with(sun.data,
photon_ratio(w.length, s.e.irrad, new_waveband(400,500), new_waveband(400,700)))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.