black_or_white

Chose black or white color based on a color to be used as background.
Usefull when using <code>geom_text</code> on top of tiles or bars, or
<code>geom_label</code> with a variable fill.

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

black_or_white function

<dl><dt>colors</dt>
<dd>character A vector of color definitions.</dd>
<dt>threshold</dt>
<dd>numeric in range 0 to 1.</dd></dl>

Arguments

Chose black vs. white color based on weighted mean of RGB channels — black_or_white

<dl>

<dt>colors</dt>
<dd>character A vector of color definitions.</dd>


<dt>threshold</dt>
<dd>numeric in range 0 to 1.</dd>

</dl>

black_or_white: Chose black vs. white color based on weighted mean of RGB channels

Description

Usage

Arguments

Examples