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
xgiven that it is generated by the component subspace. The data structure
mixdefines the mixture model, while the matrix
xcontains the data vectors. Each row of
xrepresents a single vector.
Copyright (c) Ian T Nabney (1996-9)