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<title>geomean. pfm 0.3-8</title>
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Johannes Ranke
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<h1>Calculate the geometric mean</h1>
<div class="row">
<div class="span8">
<h2>Usage</h2>
<pre><span class="functioncall"><a href='geomean.html'>geomean</a></span><span class="keyword">(</span><span class="symbol">x</span><span class="keyword">,</span> <span class="argument">na.rm</span> <span class="argument">=</span> <span class="number">TRUE</span><span class="keyword">)</span></pre>
<h2>Arguments</h2>
<dl>
<dt>x</dt>
<dd>Vector of numbers</dd>
<dt>na.rm</dt>
<dd>Should NA values be omitted?</dd>
</dl>
<div class="Value">
<h2>Value</h2>
<p><dl>
The geometric mean
</dl></p>
</div>
<div class="Description">
<h2>Description</h2>
<p>Based on some posts in a thread on Stackoverflow
<a href = 'http://stackoverflow.com/questions/2602583/geometric-mean-is-there-a-built-in'>http://stackoverflow.com/questions/2602583/geometric-mean-is-there-a-built-in</a>
This function checks for negative values, removes NA values per default and
returns 0 if at least one element of the vector is 0.</p>
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<h2 id="examples">Examples</h2>
<pre class="examples"><div class='input'><span class="functioncall"><a href='geomean.html'>geomean</a></span><span class="keyword">(</span><span class="functioncall"><a href='http://www.rdocumentation.org/packages/base/topics/c'>c</a></span><span class="keyword">(</span><span class="number">1</span><span class="keyword">,</span> <span class="number">3</span><span class="keyword">,</span> <span class="number">9</span><span class="keyword">)</span><span class="keyword">)</span></div>
<div class='output'>[1] 3
</div>
<div class='input'><span class="functioncall"><a href='geomean.html'>geomean</a></span><span class="keyword">(</span><span class="functioncall"><a href='http://www.rdocumentation.org/packages/base/topics/c'>c</a></span><span class="keyword">(</span><span class="number">1</span><span class="keyword">,</span> <span class="number">3</span><span class="keyword">,</span> <span class="number">NA</span><span class="keyword">,</span> <span class="number">9</span><span class="keyword">)</span><span class="keyword">)</span></div>
<div class='output'>[1] 3
</div>
<div class='input'><span class="comment">## Not run: geomean(c(1, -3, 9)) # returns an error</span></div></pre>
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<h2>Author</h2>
Johannes Ranke
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