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<title>Description of dbeta</title>
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<h1>dbeta
</h1>
<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>DBETA The beta density function</strong></div>
<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function d = dbeta(x,a,b) </strong></div>
<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment">DBETA The beta density function
f = dbeta(x,a,b)</pre></div>
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<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../matlabicon.gif)">
</ul>
This function is called by:
<ul style="list-style-image:url(../matlabicon.gif)">
<li><a href="qbeta.html" class="code" title="function x = qbeta(p,a,b)">qbeta</a> QBETA The beta inverse distribution function</li></ul>
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<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function d = dbeta(x,a,b)</a>
0002 <span class="comment">%DBETA The beta density function</span>
0003 <span class="comment">%</span>
0004 <span class="comment">% f = dbeta(x,a,b)</span>
0005
0006 <span class="comment">% Anders Holtsberg, 18-11-93</span>
0007 <span class="comment">% Copyright (c) Anders Holtsberg</span>
0008
0009 <span class="keyword">if</span> any(any((a&lt;=0)|(b&lt;=0)))
0010 error(<span class="string">'Parameter a or b is nonpositive'</span>)
0011 <span class="keyword">end</span>
0012
0013 I = find((x&lt;0)|(x&gt;1));
0014
0015 d = x.^(a-1) .* (1-x).^(b-1) ./ beta(a,b);
0016 d(I) = 0*I;</pre></div>
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