R_FR

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

Provides functions for quantifying visible (VIS) and ultraviolet
(UV) radiation in relation to the photoreceptors Phytochromes,
Cryptochromes, and UVR8 which are present in plants. It also includes data
sets on the optical properties of plants. Part of the 'r4photobiology'
suite, Aphalo P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>.

Pedro Aphalo

photobiologyPlants

Plant Photobiology Related Functions and Data

Pedro J. Aphalo

R_FR function

<dl><dt>spct</dt>
<dd>an object of class "source.spct"</dd>
<dt>std</dt>
<dd>select which definition of red and far-red should be used,
defaults to "Smith"</dd>
<dt>use.cached.mult</dt>
<dd>logical indicating whether multiplier values should be
cached between calls</dd>
<dt>use.hinges</dt>
<dd>logical indicating whether to use hinges to reduce
interpolation errors</dd></dl>

Arguments

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

<dl>

<dt>spct</dt>
<dd>an object of class "source.spct"</dd>


<dt>std</dt>
<dd>select which definition of red and far-red should be used,
defaults to "Smith"</dd>


<dt>use.cached.mult</dt>
<dd>logical indicating whether multiplier values should be
cached between calls</dd>


<dt>use.hinges</dt>
<dd>logical indicating whether to use hinges to reduce
interpolation errors</dd>

</dl>

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

Description

Usage

Value

Arguments

See Also

Examples