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Diffstat (limited to 'sourcecodes/bnt-master/netlab3.3/mdnpost.m')
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1 files changed, 26 insertions, 0 deletions
diff --git a/sourcecodes/bnt-master/netlab3.3/mdnpost.m b/sourcecodes/bnt-master/netlab3.3/mdnpost.m new file mode 100644 index 00000000..2a27849e --- /dev/null +++ b/sourcecodes/bnt-master/netlab3.3/mdnpost.m @@ -0,0 +1,26 @@ +function [post, a] = mdnpost(mixparams, t) +%MDNPOST Computes the posterior probability for each MDN mixture component. +% +% Description +% POST = MDNPOST(MIXPARAMS, T) computes the posterior probability +% P(J|T) of each data vector in T under the Gaussian mixture model +% represented by the corresponding entries in MIXPARAMS. Each row of T +% represents a single vector. +% +% [POST, A] = MDNPOST(MIXPARAMS, T) also computes the activations A +% (i.e. the probability P(T|J) of the data conditioned on each +% component density) for a Gaussian mixture model. +% +% See also +% MDNGRAD, MDNPROB +% + +% Copyright (c) Ian T Nabney (1996-2001) +% David J Evans (1998) + +[prob a] = mdnprob(mixparams, t); + +s = sum(prob, 2); +% Set any zeros to one before dividing +s = s + (s==0); +post = prob./(s*ones(1, mixparams.ncentres)); |