transmittance_spct

Mean transmittance for one or more wavebands of a filter or object spectrum.

internal

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

transmittance_spct function

<dl><dt>spct</dt>
<dd>an object of class "generic_spct".</dd>
<dt>w.band</dt>
<dd>waveband or list of waveband objects or a numeric vector of
length two. The waveband(s) determine the region(s) of the spectrum that
are summarized. If a numeric range is supplied a waveband object is
constructed on the fly from it.</dd>
<dt>quantity</dt>
<dd>character string One of "total", "average" or "mean",
"contribution", "contribution.pc", "relative" or "relative.pc".</dd>
<dt>wb.trim</dt>
<dd>logical Flag indicating if wavebands crossing spectral data boundaries
are trimmed or ignored.</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>
<dt>naming</dt>
<dd>character one of "long", "default", "short" or "none". Used to
select the type of names to assign to returned value.</dd>
<dt>...</dt>
<dd>other arguments (possibly used by derived methods).</dd></dl>

Arguments

Calculate transmittance from spectral transmittance. — transmittance_spct

<dl>

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


<dt>w.band</dt>
<dd>waveband or list of waveband objects or a numeric vector of
length two. The waveband(s) determine the region(s) of the spectrum that
are summarized. If a numeric range is supplied a waveband object is
constructed on the fly from it.</dd>


<dt>quantity</dt>
<dd>character string One of "total", "average" or "mean",
"contribution", "contribution.pc", "relative" or "relative.pc".</dd>


<dt>wb.trim</dt>
<dd>logical Flag indicating if wavebands crossing spectral data boundaries
are trimmed or ignored.</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>


<dt>naming</dt>
<dd>character one of "long", "default", "short" or "none". Used to
select the type of names to assign to returned value.</dd>


<dt>...</dt>
<dd>other arguments (possibly used by derived methods).</dd>

</dl>

transmittance_spct: Calculate transmittance from spectral transmittance.

Description

Usage

Value

Arguments