R_FR: Calculate R:FR photon ratio from spectral irradiance.

In photobiologyPlants: Plant Photobiology Related Functions and Data

Calculate R:FR photon ratio from spectral irradiance.

Description

This function returns the red:far-red photon ratio of a light source spectrum.

Usage

R_FR(spct, std = "Smith10", use.cached.mult = FALSE, use.hinges = TRUE)

Arguments

spct	an object of class "source.spct"
std	select which definition of red and far-red should be used, defaults to "Smith"
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 R:FR photon ratio, with name attribute set to the name of the wavebands, with "(q:q)" appended.

See Also

link[photobiologyWavebands]{Red}, link[photobiologyWavebands]{Far_red}.

Examples

R_FR(sun.spct)

photobiologyPlants documentation built on May 31, 2023, 6:08 p.m.