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Hidden Markov Models are used for modelling systems that are assumed to be Markov processes with hidden (i.e. unobserved) states.
0
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Accepted
HMM & the unfair die problem?
Each dice has one probability mass function (pmf). In a discrete HMM, a pmf is assigned to each state.
So my first remark is when you say: "The transition matrix for each individual die's unfair prob …
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Apply HMM on a stock dataset or any other real dataset
Taylor answer is accurate. I do not see HMM as suited to the data set you propose as is however. It seems to me that the number of samples in the time series is too little...
To answer your question …
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Computing Classification Error between HMMs
As the sequences are generated by HMM1 you will expect most of the data sequences to have a higher likelihood with respect to HMM1 than with respect to HMM2 as your first sentence suggests.
The exper …
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Overlapping Gaussian output distributions for HMM states
A Gaussian is not only represented by its mean but also by its variance. The variances will be very different for each Gaussian in this case and they are taking into account in the HMM. Basically, if …
5
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What is the difference between a Hidden Markov Model and a Mixture Markov Model?
I am not familiar with what you call mixture Markov models. However, as I say further in this answer, some people call hidden Markov models, dynamical mixture model. It is possible that other people r …
2
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Are there any examples of hidden Markov models that are not mixture models?
HMMs model ordered sequences of observations or time-series $X = \{x_1, x_2,..., x_T\}$, where each $x_i$ can be a discrete or continuous, uni-dimensional or multi-dimensional observation/data sample. …
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HMM for multichannel - multivariate data
One option:
I worked on this exact same problem couple of years ago. The mixed data I was working with were multivariate with some of the dimensions being categorical and some other continuous.
The …
1
vote
Accepted
HMM with unknown number of hidden states
For the number of hidden states, many estimation methods rely on trial/error, computing a score (like the BIC, AIC, or MML) and decide the final topology from these scores.
The drawback of these scor …
3
votes
What's a multivariate Hidden Markov Model?
We usually call multivariate HMM an HMM that model multidimensional observations.
If you have time series in the form:
X = [1 2 3 4 5 1 2] (each value corresponding to a time step), you will model t …
1
vote
Accepted
How to Train HMM model with two different sequences using the Baum-Wech algorithm
I am missing some information about your problem for a complete answer, but assuming that you have a finite number of known containers that can be used and that this number is not too big, here is wha …
2
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Viterbi and forward-backward algorithm in HMM
The HMM parameters are estimated using a forward-backward algorithm also called the Baum-Welch algorithm.
The Viterbi algorithm is used to get the most likely states sequnce for a given observation s …