[mlpack-git] [mlpack] How to speed up HMM training ? (#550)

[Baptiste Wicht]

Thanks for your answer :)

> It's worth noting that the GMM code you pasted where you iterate over each image and call gmm->Train(images[i], 1, true) is actually quite different than what hmm->Train(images) will do.

Yes, I figured that out eventually and flattened all my sequence into one. 

> Another thing worth noting is that, in general, training a GMM-HMM without labeled data is a long process that may not give very good results. It's much better to do labeled training if possible.

Does that change anything when there is only one state ? 

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