Maura, On Nov 14, 2008, at 2:40 PM, <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> wrote:
> How can I access the depmix-intro vignette ? > I have displayed thhttp://cat.inist.fr/? > aModele=afficheN&cpsidt=18787092e R vignette but depmix does no > appear in the list. > I do need to go throusg some worked out example to see if it can be > used for the respiraton model. > the depmix-intro.pdf is in the doc directory of the package > > Why I get the following messages when I type : > > library(depmix) > > Warning messages: > > 1: dependency Rdonlp2 is not available > 2: dependency Rdonlp2 is not available > 3: dependency Rdonlp2 is not available > i think you need the depmixS4 package which is different from depmix. Rdonlp is not neccessary but does enhance the functionality of depmixS4 hth, Ingmar > > Thank you in advance, > Maura > > http://cat.inist.fr/?aModele=afficheN&cpsidt=18787092 > -----Messaggio originale----- > Da: [EMAIL PROTECTED] per conto di Ingmar Visser > Inviato: mer 12/11/2008 15.10 > A: Maura E Monville > Cc: r-help@r-project.org > Oggetto: Re: [R] choice of an HMM package > > Dear Maura, > > On 9 Nov 2008, at 02:24, Maura E Monville wrote: > > > We are trying to build a human respiration model. > > Preliminary analysis of some breathing signals has shown that > > humans breathe > > through switching among > > a finite number of patterns. > > Hidden Markov seems to be the right approach. Since most of our > > code is > > written in R scripting language, finding an R package implementing > > an HMM > > that we can use for our prototype would be very helpful. > > I have been suggested both *msm* and *depmixS4.* > > I have no previous experience with HMMs and feel at a loss about > > making a > > sensible choice. > > As a novice I am more attracted by msm because of the comprehensive > > documentation, with worked out examples, that I am printing out. > > Whereas I > > could not find anything but the usual R function call description > for > > depmixS4. > > ?depmixS4 provides a brief overvied of the package > ?depmix tells you how to specify models > ?fit tells you how to fit specified models > > The package also includes a vignette depmix-intro.pdf with some worked > examples. > > > Moreover, I cannot make a sense of depmixS4 documentation > > mentioning time > > series of length 1 ... Does it mean depmixS4 models time series > > made up of > > one single observation ? Sorry for my trivial question. > > As the documentation says depmixS4 also fits non-dependent mixtures, > however that > does not seem applicable in your case as you want to model time > series with HMMs. > There is no principled limitation in the lengths of timeseries > depmixS4 can handle. > > > In my case I have to model a variable which is an autocorrelated > > continuous > > function of time. The transition probabilities may as well depend > > on time. > > Therefore I believe we need an AutoRegressive Continuous Density > HMM, > > possibly also non-stationary. > > Can you provide a reference for this kind of model as that will make > your question > much more clear. > > > Any suggestion from HMM experts is welcome. > > > > Best regards, > > > > -- > > Maura E.M > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide http://www.R-project.org/posting- > > guide.html > > and provide commented, minimal, self-contained, reproducible code. > > Ingmar Visser > Department of Psychology, University of Amsterdam > Roetersstraat 15 > 1018 WB Amsterdam > The Netherlands > t: +31-20-5256723 > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code. > > > > Alice Messenger ;-) chatti anche con gli amici di Windows Live > Messenger e tutti i telefonini TIM! > Vai su http://maileservizi.alice.it/alice_messenger/index.html? > pmk=footer > [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
