Hi, Firstly, I want to apologize for my english. For a project, I have to estimate parameter estimation of a Markov model with the package RHmm. But I don't know how to. I have to use the EM algorithm. I don't understand what is the second parameter in the function asymptoticCov(HMM, obs). If it's this function that i need to use. Thanks you Alaninho -- View this message in context: http://r.789695.n4.nabble.com/Parameter-estimation-of-a-model-with-markov-RHmm-tp4633342.html Sent from the R help mailing list archive at Nabble.com.