Mercurial > hg > camir-aes2014
annotate toolboxes/FullBNT-1.0.7/bnt/potentials/@mpot/mpot_to_cpot.m @ 0:e9a9cd732c1e tip
first hg version after svn
| author | wolffd |
|---|---|
| date | Tue, 10 Feb 2015 15:05:51 +0000 |
| parents | |
| children |
| rev | line source |
|---|---|
| wolffd@0 | 1 function can = mpot_to_cpot(mom) |
| wolffd@0 | 2 % MPOT_TO_CPOT Convert a moment potential to canonical form. |
| wolffd@0 | 3 % mom = mpot_to_cpot(can) |
| wolffd@0 | 4 |
| wolffd@0 | 5 [g, h, K] = moment_to_canonical(mom.logp, mom.mu, mom.Sigma); |
| wolffd@0 | 6 can = cpot(mom.domain, mom.sizes, g, h, K); |
| wolffd@0 | 7 |
| wolffd@0 | 8 %%%%%%%%%%% |
| wolffd@0 | 9 |
| wolffd@0 | 10 function [g, h, K] = moment_to_canonical(logp, mu, Sigma) |
| wolffd@0 | 11 % MOMENT_TO_CANONICAL Convert moment characteristics to canonical form. |
| wolffd@0 | 12 % [g, h, K] = moment_to_canonical(logp, mu, Sigma) |
| wolffd@0 | 13 |
| wolffd@0 | 14 K = inv(Sigma); |
| wolffd@0 | 15 h = K*mu; |
| wolffd@0 | 16 n = length(K); |
| wolffd@0 | 17 if isempty(mu) |
| wolffd@0 | 18 g = logp + 0.5*(log(det(K)) - n*log(2*pi)); |
| wolffd@0 | 19 else |
| wolffd@0 | 20 g = logp + 0.5*(log(det(K)) - n*log(2*pi) - mu'*K*mu); |
| wolffd@0 | 21 end |