waveband_ratio

This function gives the (energy or photon) irradiance ratio between two given
wavebands of a radiation spectrum.

Definitions of classes, methods, operators and functions for use
in photobiology and radiation meteorology and climatology. Calculation of
effective (weighted) and not-weighted irradiances/doses, fluence rates,
transmittance, reflectance, absorptance, absorbance and diverse ratios and
other derived quantities from spectral data. Local maxima and minima: peaks,
valleys and spikes. Conversion between energy-and photon-based units.
Wavelength interpolation. Astronomical calculations related solar angles and
day length. Colours and vision. This package is part of the 'r4photobiology'
suite, Aphalo, P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>.

Pedro Aphalo

photobiology

Photobiological Calculations

Pedro J. Aphalo

Titta K. Kotilainen

Glenn Davis

Agnese Fazio

waveband_ratio function

<dl><dt>w.length</dt>
<dd>numeric Vector of wavelengths [\(nm\)].</dd>
<dt>s.irrad</dt>
<dd>numeric vector of spectral irradiances in
[\(W\,m^{-2}\,nm^{-1}\)] or
[\(mol\,s^{-1}\,sm^{-2}\,nm^{-1}\)] as indicated by the
argument pased to <code>unit.in</code>.</dd>
<dt>w.band.num, w.band.denom</dt>
<dd>waveband objects used to compute the numerator
and denominator of the ratio.</dd>
<dt>unit.out.num, unit.out.denom</dt>
<dd>character Base of expression used to
compute the numerator and denominator of the ratio. Allowed values
<code>"energy"</code>, and <code>"photon"</code>, or its alias <code>"quantum"</code>.</dd>
<dt>unit.in</dt>
<dd>character Allowed values <code>"energy"</code>, and <code>"photon"</code>,
or its alias <code>"quantum"</code>.</dd>
<dt>check.spectrum</dt>
<dd>logical Flag indicating whether to sanity check input
data, default is TRUE.</dd>
<dt>use.cached.mult</dt>
<dd>logical Flag indicating whether multiplier values
should be cached between calls.</dd>
<dt>use.hinges</dt>
<dd>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.</dd></dl>

Arguments

Photon or energy ratio — waveband_ratio

<dl>

<dt>w.length</dt>
<dd>numeric Vector of wavelengths [\(nm\)].</dd>


<dt>s.irrad</dt>
<dd>numeric vector of spectral irradiances in
[\(W\,m^{-2}\,nm^{-1}\)] or
[\(mol\,s^{-1}\,sm^{-2}\,nm^{-1}\)] as indicated by the
argument pased to <code>unit.in</code>.</dd>


<dt>w.band.num, w.band.denom</dt>
<dd>waveband objects used to compute the numerator
and denominator of the ratio.</dd>


<dt>unit.out.num, unit.out.denom</dt>
<dd>character Base of expression used to
compute the numerator and denominator of the ratio. Allowed values
<code>"energy"</code>, and <code>"photon"</code>, or its alias <code>"quantum"</code>.</dd>


<dt>unit.in</dt>
<dd>character Allowed values <code>"energy"</code>, and <code>"photon"</code>,
or its alias <code>"quantum"</code>.</dd>


<dt>check.spectrum</dt>
<dd>logical Flag indicating whether to sanity check input
data, default is TRUE.</dd>


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


<dt>use.hinges</dt>
<dd>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.</dd>

</dl>

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waveband_ratio: Photon or energy ratio

Description

Usage

Value

Arguments

Examples