sample_spct

sample_mspct

A method to extract a random sample of spectra from a collection of spectra
or a spectrum object containing multiple spectra in long form.

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

sample_spct function

<dl><dt>x</dt>
<dd>generic_spct An object possibly containing multiple spectra.</dd>
<dt>size</dt>
<dd>integer The number of spectra to extract, if available.</dd>
<dt>recursive</dt>
<dd>logical Sample members of x directly, or first split
members containing multiple spectra.</dd></dl>

Arguments

Random sample from collection of spectra — sample_spct

<dl>

<dt>x</dt>
<dd>generic_spct An object possibly containing multiple spectra.</dd>


<dt>size</dt>
<dd>integer The number of spectra to extract, if available.</dd>


<dt>recursive</dt>
<dd>logical Sample members of x directly, or first split
members containing multiple spectra.</dd>

</dl>

sample_spct: Random sample from collection of spectra

Description

Usage

Value

Arguments

See Also