Displaying 20 results from an estimated 3000 matches similar to: "multivariate markov switching"
2005 Sep 26
1
hidden markov models
Dear R community,
I am looking for an R package or other software to study hidden
Markov models. I need to be able to incorporate multivariate
emissions and covariates for the transition probabilities. The msm
package seems almost perfect for my purpose, but I do not think it
allows multivariate emissions.
I will be grateful for your suggestions.
All the best,
--
Emilio A. Laca
One
2005 Dec 01
1
contrib pkg install problem on Windows with R2.2.0
Dear R-helpers,
I made the package depmix for fitting hidden markov models.
After updating R to version 2.2.0 on my PC I got the following error when
installing the package from a local directory. One of the C files includes
the R.h file which apparently causes problems.
I call
R CMD INSTALL --docs="normal" depmix
and I get the following error:
make[3]: *** No rule to make target
2012 Jul 27
1
fitting Markov Switching Model
Dear Users,
i have this time series, the tree lines means different level, i would use
a Markov switching model with two states to modelling this time series. i
would obtain the relative transition matrix (2X2)
the first state is above the value of 23.65 (the higher line)
the second state is below the value of 23.65
You can ignore the other two lines
2008 Nov 09
1
choice of an HMM package
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
2006 Mar 22
2
R package for computing state path using Viterbi algorithm
Dear list,
This question is about Hidden Markov Model. Given a transition
matrix, an emission matrix and a sequence of observed symbols
(actually, nucleotide sequences, A, T, C and G), I hope to predict the
sequence of state by Viterbi algorithm. I searched R repository for
related packages. msm package has function viterbi.msm (as well as
very good document), but it only works for
2007 Nov 23
1
Bug in pacf -- Proposed patch (PR#10455)
Dear all,
following the thread
http://tolstoy.newcastle.edu.au/R/e2/devel/07/09/4338.html
regarding the bug in the partial autocorrelation function for
multivariate time series.
I have prepared a web page with patches and relevant information.
http://www2.stat.unibo.it/giannerini/R/pacf.htm
Please do not hesitate to contact me for further clarifications
regards
Simone
--
2011 Dec 01
1
Estimation of AR(1) Model with Markov Switching
Dear R users,
I have been trying to obtain the MLE of the following model
state 0: y_t = 2 + 0.5 * y_{t-1} + e_t
state 1: y_t = 0.5 + 0.9 * y_{t-1} + e_t
where e_t ~ iidN(0,1)
transition probability between states is 0.2
I've generated some fake data and tried to estimate the parameters using the
constrOptim() function but I can't get sensible answers using it. I've tried
using
2012 Apr 20
1
depmixS4+transition
Dear helpers,
is there any possible that transition (in depmixS4) is in scale of two
variable, e.g transition=~scale(x1,x2)?
If it can be, how transition of two variable (covariate time) can be worked
in depmixS4-hidden markov model for time series.
Many thanks,
nglthu
--
View this message in context: http://r.789695.n4.nabble.com/depmixS4-transition-tp4572726p4572726.html
Sent from the R help
2008 Nov 11
1
R: R: Hidden Markov Models
Thank you for your prompt answer.
The breathing signal observations are the amplitude values as a function of time and phase.
According to our model the hidden states are the different breathing types.
Subjects, whose respiratiion process is regular, are likely to breathe, keeping the same cycle pattern/type,
for many consecutive cycles. therefore dwelling in the same hidden state.
The more
2006 Feb 06
1
generating markov chain
Dear help group,
Just fyi a markov chain is a sequence of transitions between states (say A,T,G,C - on a gene) with a given probability for each transition. In this case there'd be 16 different kinds, each with a different weight.
Given a transition matrix (4x4) filled with all transition probabilities of course, how can I generate a random sequence of a given length, say 200?
2008 Jun 05
2
qf with infinite df
Dear all,
I found the following behaviour
> rf(5,Inf,Inf)
[1] 1 1 1 1 1
but
> qf(0.1,Inf,Inf)
[1] NaN
Warning messages:
1: In qf(0.1, Inf, Inf) : value out of range in 'lgamma'
2: In qf(p, df1, df2, lower.tail, log.p) : NaNs produced
incidentally,
> pf(1.00000000000001,Inf,Inf)
[1] 1
> pf(1.0000000000000001,Inf,Inf)
[1] 0.5
Is this the expected behaviour?
Thanks
2007 Oct 30
2
markov regime switching models
Hi,
I am looking for a package to estimate regime switching models (states
following a markov chain).
I found packages for Hidden Markov Models but I am looking for something a
little different: In the HMM the conditional distribution of the
observations (give the state) is a known distribution (normal or others),
while the package I need should allow to set a conditional distribution
(given the
2011 Jul 27
1
Hidden Markov Models in R
R Community -
I am attempting to fit a model as described in Hampton, Bossaerts, and
O'doherty (J. Neuroscience) 2006. They use a bayesian hidden markov model
to model the Reversal Learning data. I have tried using HMM and depmixS4
with no success. My data is a Reversal Learning Task in which there are 3
sets of patterns over 3 blocks. The participant receives incorrect or
correct
2010 Oct 26
1
Markov Switching with TVTP - problems with convergence
Greetings fellow R entusiasts!
We have some problems converting a computer routine written initially for
Gauss to estimate a Markov Regime Switching analysis with Time Varying
Transition Probability. The source code in Gauss is here:
http://www.econ.washington.edu/user/cnelson/markov/programs/hmt_tvp.opt
We have converted the code to R, and it's running without errors, but we
have some
2020 May 18
1
parRapply and parCapply return a list in corner cases
According to ?parCapply:
parRapply and parCapply always return a vector.
This appears not to be the case in the following minimal reproducible example:
> library(parallel)
> nslaves <- 2
> cl <- makeCluster(nslaves)
> X <- matrix(2,nrow=3,ncol=4)
> X <- rbind(c(1,1,0,1),X)
> tv <- parCapply(cl,X,FUN=function(x){
+
2016 Apr 05
2
Under Windows, Rgui and Rterm crash if one tries to close the graphic device while identify or locator are running
minimal reproducible example
plot(1,1)
identify(1,1) # or locator()
now, trying to close the window by clicking on the cross of the upper
right corner causes Rgui (and Rterm) to crash.
I see the same behaviour on 2 different Windows PC (one with Win 8.1
and one with Win 10).
I did not see the problem in linux (see below)
WINDOWS **************
> sessionInfo()
R version 3.3.0 beta
2008 Dec 26
1
/bin/windows/base/rpatched.html page out of date
Dear all,
it looks like that something is wrong with the
/bin/windows/base/rpatched.html page as it seems pointing to the
2.8.1rc version.
Also, I do not know if it is relevant but notice the dates of the
following files on
ftp://ftp.stat.math.ethz.ch/Software/CRAN/bin/windows/base/
R-2.8.1pat-win32.exe 31963 KB 22/12/2008 16.15.00
R-2.8.1rc-win32.exe 31991 KB 25/12/2008 9.30.00
thank
2007 Jun 14
1
building packages under windows
I tried to check or build a package under windows xp but I got the error
the package can not be installed
(without any details in the install.out file)
I work with R-2.5.0, Miktex 2.5.0, and I have installed the unix tools.zip,
Perl and Microsoft HTML Workshop.
The path environment is ok.
Have someone else encountered the same problem?
Thank you,
Cinzia
2007 Jun 12
1
Building packages with subroutine in fortran 90 under windows xp
Hello,
I work under windows xp and I am trying to build a R package with a subroutine written in fortran 90.
I have installed all the updated tools and I am working with R-2.4.0 or R-2.5.0.
When I check a package with a subroutine in fortran 77 (and extension f) everything is ok.
When I try to build the same package with a subroutine in fortran 90 (with extension f90) the following warning
2009 Jan 08
1
legend() in a multiple figure environment
Dear all,
there seems to be a problem with displayed legends when a multiple
figure environment is used, see the following example:
par(mfrow=c(1,2))
curve(dnorm,col=4,from=-4,to=4);
legend(-4,0.3,legend="curve",lty=1,col=4)
legend(-4,0.2,legend="curve",lty=1,col=4)
On my machines the first time the command legend() is issued the
legend box stretches over the curve.