[mlpack-git] [mlpack/mlpack] How to organize the data? (#809)
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Mon Nov 7 09:59:47 EST 2016
If you are using a discrete distribution (`--type discrete`), then multidimensional observations aren't supported. It would not be impossible to support multidimensional discrete distributions (but there will be no relation between dimensions), but currently the code doesn't do that. I think that we should leave this issue open until multidimensional support is added for HMMs. For now, you might consider "collapsing" your dimensions: suppose that each of your three dimensions takes values between 0 and 7 (so, 3 bits). Then given `(a, b, c)` you map to a single-dimension value of `2^6 * a + 2^3 * b + c`. That will cost performance but it will be a workaround for now. You could also use a Gaussian HMM if the dimensions are not categorical (`--type gaussian`).
Sorry that the support you are looking for is currently not there.
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