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<h1>Calculate the geometric mean</h1>
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<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>
<pre class="usage"><span class='fu'>geomean</span>(<span class='no'>x</span>, <span class='kw'>na.rm</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)</pre>
<h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a> Arguments</h2>
<table class="ref-arguments">
<colgroup><col class="name" /><col class="desc" /></colgroup>
<tr>
<th>x</th>
<td><p>Vector of numbers</p></td>
</tr>
<tr>
<th>na.rm</th>
<td><p>Should NA values be omitted?</p></td>
</tr>
</table>
<h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
<p>The geometric mean</p>
<h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
<pre class="examples"><div class='input'><span class='fu'>geomean</span>(<span class='fu'>c</span>(<span class='fl'>1</span>, <span class='fl'>3</span>, <span class='fl'>9</span>))</div><div class='output co'>#> [1] 3</div><div class='input'><span class='fu'>geomean</span>(<span class='fu'>c</span>(<span class='fl'>1</span>, <span class='fl'>3</span>, <span class='fl'>NA</span>, <span class='fl'>9</span>))</div><div class='output co'>#> [1] 3</div><div class='input'><span class='co'>## Not run: geomean(c(1, -3, 9)) # returns an error</span></div></pre>
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<h2>Contents</h2>
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<li><a href="#arguments">Arguments</a></li>
<li><a href="#value">Value</a></li>
<li><a href="#examples">Examples</a></li>
</ul>
<h2>Author</h2>
Johannes Ranke
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