find_idfactor

Find if an 'idfactor' is present and needed in the plot and assemble a
suitable plot layer to handle it.

internal

Additional annotations, stats, geoms and scales for plotting
"light" spectra with 'ggplot2', together with specializations of ggplot()
and autoplot() methods for spectral data and waveband definitions
stored in objects of classes defined in package 'photobiology'. Part of the
'r4photobiology' suite, Aphalo P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>.

Pedro Aphalo

ggspectra

Extensions to 'ggplot2' for Radiation Spectra

Pedro J. Aphalo

Titta K. Kotilainen

find_idfactor function

<dl><dt>spct</dt>
<dd>generic_spct or derived object</dd>
<dt>idfactor</dt>
<dd>character Name of an index column in data holding a
<code>factor</code> with each spectrum in a long-form multispectrum object
corresponding to a distinct spectrum. If <code>idfactor=NULL</code> the name of
the factor is retrieved from metadata or if no metadata found, the default
"spct.idx" is tried. If <code>idfactor=NA</code> no aesthetic is mapped to the
spectra and the user needs to use 'ggplot2' functions to manually map an
aesthetic or use facets for the spectra.</dd>
<dt>annotations</dt>
<dd>a character vector.</dd>
<dt>facets</dt>
<dd>logical or numeric Flag indicating if facets are to be created
when the data contains multiple spectra, if numeric the number of columns.</dd>
<dt>num.columns</dt>
<dd>numeric Number of data columns from multiple scans. Relevant
only to <code>raw_spct</code> and <code>cps_spct</code> objects.</dd>
<dt>...</dt>
<dd>currently not used.</dd></dl>

Arguments

Find 'idfactor' — find_idfactor

<dl>

<dt>spct</dt>
<dd>generic_spct or derived object</dd>


<dt>idfactor</dt>
<dd>character Name of an index column in data holding a
<code>factor</code> with each spectrum in a long-form multispectrum object
corresponding to a distinct spectrum. If <code>idfactor=NULL</code> the name of
the factor is retrieved from metadata or if no metadata found, the default
"spct.idx" is tried. If <code>idfactor=NA</code> no aesthetic is mapped to the
spectra and the user needs to use 'ggplot2' functions to manually map an
aesthetic or use facets for the spectra.</dd>


<dt>annotations</dt>
<dd>a character vector.</dd>


<dt>facets</dt>
<dd>logical or numeric Flag indicating if facets are to be created
when the data contains multiple spectra, if numeric the number of columns.</dd>


<dt>num.columns</dt>
<dd>numeric Number of data columns from multiple scans. Relevant
only to <code>raw_spct</code> and <code>cps_spct</code> objects.</dd>


<dt>...</dt>
<dd>currently not used.</dd>

</dl>

find_idfactor: Find 'idfactor'

Description

Usage

Value

Arguments