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<title>
Netlab Reference Manual gmmactiv
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<H1> gmmactiv
</H1>
<h2>
Purpose
</h2>
Computes the activations of a Gaussian mixture model.
<p><h2>
Synopsis
</h2>
<PRE>
a = gmmactiv(mix, x)
</PRE>
<p><h2>
Description
</h2>
This function computes the activations <CODE>a</CODE> (i.e. the
probability <CODE>p(x|j)</CODE> of the data conditioned on each component density)
for a Gaussian mixture model. For the PPCA model, each activation
is the conditional probability of <CODE>x</CODE> given that it is generated
by the component subspace.
The data structure <CODE>mix</CODE> defines the mixture model, while the matrix
<CODE>x</CODE> contains the data vectors. Each row of <CODE>x</CODE> represents a single
vector.
<p><h2>
See Also
</h2>
<CODE><a href="gmm.htm">gmm</a></CODE>, <CODE><a href="gmmpost.htm">gmmpost</a></CODE>, <CODE><a href="gmmprob.htm">gmmprob</a></CODE><hr>
<b>Pages:</b>
<a href="index.htm">Index</a>
<hr>
<p>Copyright (c) Ian T Nabney (1996-9)
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