a = gmmactiv(mix, x)
a (i.e. the
probability p(x|j) of the data conditioned on each component density)
for a Gaussian mixture model. For the PPCA model, each activation
is the conditional probability of x given that it is generated
by the component subspace.
The data structure mix defines the mixture model, while the matrix
x contains the data vectors. Each row of x represents a single
vector.
gmm, gmmpost, gmmprobCopyright (c) Ian T Nabney (1996-9)