photobiology (version 0.10.6)

split_photon_irradiance: Photon irradiance for split spectrum regions

Description

This function returns the photon irradiance for a series of contiguous wavebands from a radiation spectrum. The returned values can be either absolute or relative to their sum.

Usage

split_photon_irradiance(
  w.length,
  s.irrad,
  cut.w.length = range(w.length),
  unit.in = "energy",
  scale = "absolute",
  check.spectrum = TRUE,
  use.cached.mult = FALSE,
  use.hinges = getOption("photobiology.use.hinges", default = NULL)
)

Arguments

w.length

numeric vector of wavelengths (nm).

s.irrad

numeric vector of spectral (energy or photon) irradiance values (W m-2 nm-1).

cut.w.length

numeric vector of wavelengths (nm).

unit.in

character Allowed values "energy", and "photon", or its alias "quantum".

scale

a character A string indicating the scale used for the returned values ("absolute", "relative", "percent").

check.spectrum

logical Flag indicating whether to sanity check input data, default is TRUE.

use.cached.mult

logical Flag indicating 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.

Value

a numeric vector of photon irradiances with no change in scale factor: [W m-2 nm-1] -> [mol s-1 m-2], [mol s-1 m-2 nm-1] -> [mol s-1 m-2] or relative values (fraction of one based on photon units) if scale = "relative" or scale = "percent".

See Also

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(), photon_ratio(), photons_energy_ratio(), prod_spectra(), s_e_irrad2rgb(), split_energy_irradiance(), subt_spectra(), sum_spectra(), trim_tails(), v_insert_hinges(), v_replace_hinges()

Examples

# NOT RUN {
with(sun.data,
     split_photon_irradiance(w.length, s.e.irrad,
             cut.w.length = c(300, 400, 500, 600, 700)))
with(sun.data,
     split_photon_irradiance(w.length, s.e.irrad))

# }