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Diffstat (limited to 'sourcecodes/bnt-master/HMM/pomdp_sample.m')
| -rw-r--r-- | sourcecodes/bnt-master/HMM/pomdp_sample.m | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/sourcecodes/bnt-master/HMM/pomdp_sample.m b/sourcecodes/bnt-master/HMM/pomdp_sample.m new file mode 100644 index 00000000..836ce39f --- /dev/null +++ b/sourcecodes/bnt-master/HMM/pomdp_sample.m @@ -0,0 +1,20 @@ +function [obs, hidden] = pomdp_sample(initial_prob, transmat, obsmat, act) +% SAMPLE_POMDP Generate a random sequence from a Partially Observed Markov Decision Process. +% [obs, hidden] = sample_pomdp(prior, transmat, obsmat, act) +% +% Inputs: +% prior(i) = Pr(Q(1)=i) +% transmat{a}(i,j) = Pr(Q(t)=j | Q(t-1)=i, A(t)=a) +% obsmat(i,k) = Pr(Y(t)=k | Q(t)=i) +% act(a) = A(t), so act(1) is ignored +% +% Output: +% obs and hidden are vectors of length T=length(act) + + +len = length(act); +hidden = mdp_sample(initial_prob, transmat, act); +obs = zeros(1, len); +for t=1:len + obs(t) = sample_discrete(obsmat(hidden(t),:)); +end |