Re: Murphy HMM problem

In article <1146736031.071137.324230@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, "PaulN" <paulnicholl@xxxxxxxxxxx> wrote:

I'm using Kevin Murphy's HMM toolbox to model faces. However, when I
run the Expectation Maximisation function - mhmm_em - I'm getting the
following error:

??? Error using ==> assert
assertion violated:

Error in ==> fwdback at 150
assert(approxeq(sum(alpha(:,t)),1));

Error in ==> mhmm_em>ess_mhmm at 145
[alpha, beta, gamma, current_loglik, xi, gamma2] = ...

Error in ==> mhmm_em at 69
[loglik, exp_num_trans, exp_num_visits1, postmix, m, ip, op] = ...

Error in ==> trainSingleHMM at 20
[LL, prior1, transmat1, mu1, Sigma1, mixmat1] =...
...

Has anyone encountered this error before? I'm a bit of a novice when
it comes to HMMs, so I'm not really sure what's going on. My HMMs have
5 states, and each Gaussian mix has 5 mixtures.

Thanks,
Paul.

Only a guess, but try this in matlab

which assert -all

Do you have multiple functions named assert.m on
your search path? Have you downloaded the function
assert.m from the file exchange?

HTH,
John D'Errico


--
The best material model of a cat is another, or preferably the same, cat.
A. Rosenblueth, Philosophy of Science, 1945

Those who can't laugh at themselves leave the job to others.
Anonymous
.

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