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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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<html> <head> <title> Netlab Reference Manual gmmactiv </title> </head> <body> <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) </body> </html>