Gaussian Mixture Model

      I am doing voice recognition using MFCC and GMM.

First I found out the melcepst coefficients. There were about 12 mel cespstrum coefficients.

But now I want to construct the gaussian mixture model for this data. To find the data of a gaussian model whose means,covariance are known, we use the function gmdistribution. But I want to find out the mean and other parameters from the data. What is the function used for this?

After finding that out I want to find out the log likelihood for the given input data. What should I do for that?