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I am looking for some simple Mathematica code to model an HMM with just a few states and an equal number of observable signals (emissions). I am hoping to generate sample paths and keep track of the posterior probability of the system being in a given state. Any help would be appreciated.

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Is this the sort of thing? –  cormullion Jun 12 '13 at 14:33
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Here's a tutorial on fitting hidden markov models in Mathematica including an example applied to financial data. ams.sunysb.edu/~frey/QuantitativeFinance/Resources/… –  bill s Jun 12 '13 at 14:49
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@Tox If you want to simulate paths this might be useful. –  Rod Jun 12 '13 at 15:08
    
This needs a v10 answer :) –  Rojo Jul 13 at 0:03

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Thanks. I also found that there is a package with inbuilt functions, although super pricey, at http://scientificcomputing.blogspot.co.uk/2006/02/statistical-inference-package-for.html

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