Displaying 20 results from an estimated 5000 matches similar to: "depmixS4 prediction"
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
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2012 May 02
1
DepmixS4
Hi I am trying to use depmixS4 package. Based on the documentation, it seems
that depmix allows one to fit an HMM model based on a training data with
time-varying co-variates. However, I did not find any routines which can
help test the accuracy on the fitted HMM model on out-of-sample data.
Can someone confirm if that is indeed the case?
Also are there any alternate packages for the same?
Thanks
2023 Jun 25
1
depmixs4 standardError() issue
On Tue, 30 May 2023 17:43:31 +0000
Heather Lucas <hlucas2 at lsu.edu> wrote:
> Hello,
>
> I've been enjoying using the "Mixture and Hidden Markov Models in R"
> by Visser & Speekenbrink to learn how to apply these analyses to my
> own data using depmixS4.
>
> I currently have a fitted 4-state mixture model with three emissions
> variables and one
2023 May 30
1
depmixs4 standardError() issue
Hello,
I've been enjoying using the "Mixture and Hidden Markov Models in R" by Visser & Speekenbrink to learn how to apply these analyses to my own data using depmixS4.
I currently have a fitted 4-state mixture model with three emissions variables and one binomial covariate (HS). I am trying to compute confidence intervals using the following code, where fmms4s is the model:
2010 Oct 22
1
Ordinal response model in depmixS4
I am running a latent class regression with 3 nominal and 2 ordinal variables using depmixS4 but the available response models do not include one for ordinal response. How do I go about this?
Penny
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2010 Sep 20
0
depmixS4 1.0-0 on CRAN & vignette/paper on jstatsoft.org
depmixS4 has reached some form of maturity and therefore we have bumped its
version number to 1.0-0 which is now on CRAN:
http://cran.r-project.org/web/packages/depmixS4/index.html
depmixS4 fits hidden (latent) Markov models of multivariate, mixed
categorical and continuous data, otherwise known as dependent mixture
models. Responses or observations can be modeled using GLMs, and
additionally
2010 Sep 20
0
depmixS4 1.0-0 on CRAN & vignette/paper on jstatsoft.org
depmixS4 has reached some form of maturity and therefore we have bumped its
version number to 1.0-0 which is now on CRAN:
http://cran.r-project.org/web/packages/depmixS4/index.html
depmixS4 fits hidden (latent) Markov models of multivariate, mixed
categorical and continuous data, otherwise known as dependent mixture
models. Responses or observations can be modeled using GLMs, and
additionally
2005 Aug 17
1
GLM/GAM and unobserved heterogeneity
Hello,
I'm interested in correcting for and measuring unobserved
heterogeneity ("missing variables") using R. In particular, I'm
searching for a simple way to measure the amount of unobserved
heterogeneity remaining in a series of increasingly complex models
(adding additional variables to each new model) on the same data.
I have a static database of 400,000 or
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
2013 Sep 19
0
depmixS4 version 1.3-0 on CRAN
Package news (see below for general description of functionality)
depmixS4 version 1.3-0 has been released on CRAN. See the NEWS file
for an overview of all changes. The most important user-visible
changes are:
1) more compact pretty-printing of parameters in print/summary of
(dep)mix objects (following lm/glm style of presenting results)
2) some speed improvements in the EM algorithm, most
2013 Sep 19
0
[R-pkgs] depmixS4 version 1.3-0 on CRAN
Package news (see below for general description of functionality)
depmixS4 version 1.3-0 has been released on CRAN. See the NEWS file
for an overview of all changes. The most important user-visible
changes are:
1) more compact pretty-printing of parameters in print/summary of
(dep)mix objects (following lm/glm style of presenting results)
2) some speed improvements in the EM algorithm, most
2011 Nov 08
1
Help with SEM package: Error message
Hello.
I started using the sem package in R and after a lot of searching and trying
things I am still having difficulty. I get the following error message when
I use the sem() function:
Warning message:
In sem.default(ram = ram, S = S, N = N, param.names = pars, var.names =
vars, :
Could not compute QR decomposition of Hessian.
Optimization probably did not converge.
I started with a
2009 May 20
1
Non-linear regression with latent variable
Hi
Can anyone please suggest me a package where I can estimate a non-linear
regression model? One of the independent variables is latent or unobserved.
I have an indicator variable for this unobserved variable; however the
relationship is known to be non-linear also. In terms of equations my
problem is
y=f(latent, fixed)
q=g(latent) where q is the indicator variable
For me both f and g are
2006 Jul 12
1
Prediction interval of Y using BMA
Hello everybody,
In order to predict income for different time points, I fitted a linear
model with polynomial effects using BMA (bicreg(...)). It works fine, the
results are consistent with what we are looking for.
Now, we would like to predict income for a future time point t_next and of
course draw the prediction interval around the estimated value for this
point t_next. I've found the
2008 Mar 08
1
R cmd check error reg namespace
Hi,
When running R CMD check I'm getting a number of errors that I don't
quite follow and don't know where to start looking for an answer, any
hints appreciated.
R CMD check trunk
* checking for working latex ... OK
* using log directory '/Users/ivisser/Documents/projects/
depmixProject/depmixNew/rforge/depmix/trunk.Rcheck'
* using R version 2.6.2 (2008-02-08)
* checking
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 Jun 05
1
Prediction in discriminant analysis
Sir,
I am working with multiclass discriminant analysis.(say response variable
has 3classes).In R, using lda(), I get 2 sets of coefficients for the
discriminant function.Now, I want to put a new x-vector(vector of
independent variables) and want to check it corresponds to which class of
y.Is there any formula for doing this? or how can I do this?
Regards,
Suman Dhara
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2009 Apr 18
1
Modelling an "incomplete Poisson" distribution ?
Dear list,
I have the following problem : I want to model a series of observations
of a given hospital activity on various days under various conditions.
among my "outcomes" (dependent variables) is the number of patients for
which a certain procedure is done. The problem is that, when no relevant
patient is hospitalized on said day, there is no observation (for which
the "number
2010 Oct 28
1
Rsolnp examples
I'm interested in the Rsolnp package. For their primary function
"solnp", one example is given, and there is a reference to "unit
tests". Anyone know where these can be found? Also, Rsolnp is
used in a few other packages (e.g., depmixS4), but I cannot seem
to find source illustrating its call sequence, and the precise
definition of the functions passed.
Can anyone help?
2017 Sep 20
1
How to use depmix for HMM with intial parameters
Hello,
I have initial parameters for HMM model and I want to use depmixS4 package.
The parameters are in the form
intial_prob_matrix=matrix(c(0.07614213, 0.45177665, 0.47208122), nrow=1,
ncol=3, byrow = TRUE)
transition_matrix=matrix(c(0.46666667,0.46666667,0.06666667,
0.06741573,0.5617978,0.37078652,
0.02173913,0.3478261,0.63043478), nrow = 3, ncol =