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with white hues in the centre, rather than green ones. The scheme
may be useful in displaying signed quantities, and thus is somewhat
analogous to oceColorsTwo(), except that some viewers
may be able to distinguish more colors with oceColors9B."><meta property="og:description" content="The results are similar to those of oceColorsJet(), but
with white hues in the centre, rather than green ones. The scheme
may be useful in displaying signed quantities, and thus is somewhat
analogous to oceColorsTwo(), except that some viewers
may be able to distinguish more colors with oceColors9B."></head><body>
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      <h1>Create Colors in a Red-Yellow-Blue Color Scheme</h1>
      <small class="dont-index">Source: <a href="https://github.com/dankelley/oce/blob/HEAD/R/oce.R" class="external-link"><code>R/oce.R</code></a></small>
      <div class="d-none name"><code>oceColors9B.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>The results are similar to those of <code><a href="oceColorsJet.html">oceColorsJet()</a></code>, but
with white hues in the centre, rather than green ones. The scheme
may be useful in displaying signed quantities, and thus is somewhat
analogous to <code><a href="oceColorsTwo.html">oceColorsTwo()</a></code>, except that some viewers
may be able to distinguish more colors with <code>oceColors9B</code>.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">oceColors9B</span><span class="op">(</span><span class="va">n</span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>


<dl><dt id="arg-n">n<a class="anchor" aria-label="anchor" href="#arg-n"></a></dt>
<dd><p>number of colors</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
    <p>The following references provide information on choosing
colour schemes, that are suitable for viewers who have
colour deficiencies.</p>
<p>Light, Adam, and Patrick J. Bartlein. "The End of the Rainbow? Color
Schemes for Improved Data Graphics." <em>Eos, Transactions American Geophysical
Union</em> 85, no. 40 (2004): 385.
DOI: 10.1029/2004EO400002</p>
<p>Stephenson, David B. "Comment on 'Color Schemes for Improved Data
Graphics', by A Light and P.J. Bartlein." <em>Eos, Transactions American
Geophysical Union</em> 86, no.  20 (2005): 196.
DOI: 10.1029/2005EO200005</p>
<p>Light, Adam, and Patrick J. Bartlein. "Reply to 'Comment on Color
Schemes for Improved Data Graphics,' by A. Light and P.J.  Bartlein'."
<em>Eos, Transactions American Geophysical Union</em> 86, no. 20 (2005): 196–196.
DOI: 10.1029/2005EO200006</p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p>Other things related to colors:
<code><a href="colormap.html">colormap</a>()</code>,
<code><a href="colormapGMT.html">colormapGMT</a>()</code>,
<code><a href="oceColorsCDOM.html">oceColorsCDOM</a>()</code>,
<code><a href="oceColorsChlorophyll.html">oceColorsChlorophyll</a>()</code>,
<code><a href="oceColorsClosure.html">oceColorsClosure</a>()</code>,
<code><a href="oceColorsDensity.html">oceColorsDensity</a>()</code>,
<code><a href="oceColorsFreesurface.html">oceColorsFreesurface</a>()</code>,
<code><a href="oceColorsGebco.html">oceColorsGebco</a>()</code>,
<code><a href="oceColorsJet.html">oceColorsJet</a>()</code>,
<code><a href="oceColorsOxygen.html">oceColorsOxygen</a>()</code>,
<code><a href="oceColorsPAR.html">oceColorsPAR</a>()</code>,
<code><a href="oceColorsPalette.html">oceColorsPalette</a>()</code>,
<code><a href="oceColorsPhase.html">oceColorsPhase</a>()</code>,
<code><a href="oceColorsSalinity.html">oceColorsSalinity</a>()</code>,
<code><a href="oceColorsTemperature.html">oceColorsTemperature</a>()</code>,
<code><a href="oceColorsTurbidity.html">oceColorsTurbidity</a>()</code>,
<code><a href="oceColorsTurbo.html">oceColorsTurbo</a>()</code>,
<code><a href="oceColorsTwo.html">oceColorsTwo</a>()</code>,
<code><a href="oceColorsVelocity.html">oceColorsVelocity</a>()</code>,
<code><a href="oceColorsViridis.html">oceColorsViridis</a>()</code>,
<code><a href="oceColorsVorticity.html">oceColorsVorticity</a>()</code>,
<code><a href="ocecolors.html">ocecolors</a></code></p></div>
    </div>

    <div class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va"><a href="https://dankelley.github.io/oce/">oce</a></span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="imagep.html">imagep</a></span><span class="op">(</span><span class="va">volcano</span>,</span></span>
<span class="r-in"><span>    col <span class="op">=</span> <span class="fu">oceColors9B</span><span class="op">(</span><span class="fl">128</span><span class="op">)</span>,</span></span>
<span class="r-in"><span>    zlab <span class="op">=</span> <span class="st">"oceColors9B"</span></span></span>
<span class="r-in"><span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="oceColors9B-1.png" alt="" width="700" height="700"></span>
<span class="r-in"><span></span></span>
</code></pre></div>
    </div>
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