Question about GMM

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Miguel Ramirez
Miguel Ramirez on 9 Apr 2011
Hello.
I'm a student of Electronic Engineering. I have a question about GMM and gmdistribution in matlab. I'm trying to fit my data with a gaussian mixture model using the gmdistribution(mu,sigma) object. My data have 13 dimensions, but my model has only 1 component. Is this right?
I think that I needed at least one component for dimension. The covariance matrix and mean vector seems well.
Thank you.

Answers (1)

Tom Lane
Tom Lane on 11 Apr 2011
Miguel, the idea is that the distribution may be a mixture of multiple components, each of which is a multivariate normal distribution. If you have just one component, you could compute the mean and covariance of your entire dataset. That defines a single multivariate distribution. You would not need to bother with a mixture distribution.

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