Displaying 20 results from an estimated 900 matches similar to: "clustering: Multivariate t mixtures"
2013 Apr 23
2
flexmix
Hi,
I am trying to understand how to use the flexmix package, I have read the Leisch paper but am very unclear what is needed for the M-step driver. I am just fitting a simple linear regression model. The documentation is far from clear what the FLXmclust function does, but, it in principle could do all I need, however, I do not get sentible results as if I try the following the result is poor:
2002 Sep 14
2
OT: Compiling EMMIX
Sorry for the off-topic post, but there is such a wealth of knowledge here
that I thought someone might have suggestions.
Geoff MacLachlan and David Peel have a program - EMMIX - available for
mixture modelling. It is only available as FORTRAN source code and is
"downloadable" from Geoff's site. The code is reputed to run on Unix
machines and is compilable according to
2001 Nov 16
2
Finite Mixture Analysis
Are there any S-Plus or R libraries/packages that do Finite Mixture
Analysis following the algorithms similar to those implemented in Geoffrey
MacLachlan's EMMIX program?
Thanks.
Dr. Marc R. Feldesman
email: feldesmanm at pdx.edu
email: feldesman at attglobal.net
fax: 503-725-3905
"Don't know where I'm going.
Don't like where I've been.
There may be no exit.
But
2002 Sep 15
0
Thanks for help on EMMIX
Thanks to John Day, Tom Richards, Mike Prager, Thomas Lumley, and Goran
Brostrom, for various helpful suggestions that finally allowed me to get
EMMIX compiled on my Linux (and my Windows) machines.
The problem was a simple case-sensitivity issue concerning a single file,
which I had correctly downloaded but named using the wrong case
("emmix.max" instead of "EMMIX.max").
2011 Feb 28
1
mixture models/latent class regression comparison
Dear list,
I have been comparing the outputs of two packages for latent class
regression, namely 'flexmix', and 'mmlcr'. What I have noticed is that
the flexmix package appears to come up with a much better fit than the
mmlcr package (based on logLik, AIC, BIC, and visual inspection). Has
anyone else observed such behaviour? Has anyone else been successful
in using the mmlcr
2004 Sep 13
2
Mixture Analysis
Dear all,
Does anyone know if the mixture analysis (i.e : sexual dimorphism, age group,…) can be done with R software ? Thanks for your help
Dan
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2017 Jun 29
6
package to fit mixtures of student-t distributions
Hello!
I am new to R (before used python exclusively and would actually call the R solution for this issue inside a python notebook, hope that doesn?t disqualify me right of the batch).
Right now I am looking for a piece of software to fit a 1D data sample to a mixture of t-distributions.
I searched quite a while already and it seems to be that this is a somehwat obscure endeavor as most
2017 Jun 30
0
package to fit mixtures of student-t distributions
gamlss.mx can fit these I believe (although no experience with these myself)
flexmix may be (relatively easily) adaptable to accomplish this as well
hth, Ingmar
Ingmar Visser
Universitair Hoofddocent ontwikkelingspsychologie | Directeur College
Psychologie
Afdeling Psychologie | Faculteit Maatschappij- en Gedragswetenschappen |
Universiteit van Amsterdam
Bezoek | Nieuwe Achtergracht 129B | Kamer
2011 Feb 02
2
clustering with finite mixture model
Dear R-help,
I am doing clustering via finite mixture model. Please suggest some packages in
R to find clusters via finite mixture model with continuous variables. And
also I wish to verify the distributional properties of the mixture distributions
by fitting the model with lognormal, gamma, exponentials etc,.
Thanks in advance,
warm regards,Ms.Karunambigai M
PhD Scholar
Dept. of Biostatistics
2005 Aug 17
1
Fitting mixture model
I would like to fit a gaussian mixture model to a vector with about 50,000
points. I have tried using Mclust to do so, but 50,000 points requires more
memory than I have (and I am running with 4Gb). Any other suggestions for
how to do so? Oh, I don't know the number of components, but the number
will likely be less than 5 or 6.
Thanks,
Sean
2009 Apr 30
1
finite mixture model (2-component Weibull): plotting Weibull components?
Dear Knowledgeable R Community Members,
Please excuse my ignorance, I apologize in advance if this is an easy question, but I am a bit stumped and could use a little guidance.
I have a finite mixture modeling problem -- for example, a 2-component Weibull mixture -- where the components have a large overlap, and
I am trying to adapt the "mclust" package which concern to normal
2003 Apr 04
2
Bug in %in% (match)
Hi,
Am I hitting some limit in match? Consider the following example:
> tst<-seq(100,125,by=.2)%in%seq(0,800,by=.1)
> sum(tst)
[1] 76
> seq(100,125,by=.2)
[1] 100.0 100.2 100.4 100.6 100.8 101.0 101.2 101.4 101.6 101.8 102.0
102.2
[13] 102.4 102.6 102.8 103.0 103.2 103.4 103.6 103.8 104.0 104.2 104.4
104.6
[25] 104.8 105.0 105.2 105.4 105.6 105.8 106.0 106.2 106.4 106.6 106.8
2003 Apr 04
2
Bug in %in% (match)
Hi,
Am I hitting some limit in match? Consider the following example:
> tst<-seq(100,125,by=.2)%in%seq(0,800,by=.1)
> sum(tst)
[1] 76
> seq(100,125,by=.2)
[1] 100.0 100.2 100.4 100.6 100.8 101.0 101.2 101.4 101.6 101.8 102.0
102.2
[13] 102.4 102.6 102.8 103.0 103.2 103.4 103.6 103.8 104.0 104.2 104.4
104.6
[25] 104.8 105.0 105.2 105.4 105.6 105.8 106.0 106.2 106.4 106.6 106.8
2007 Feb 08
1
smartpred depends on fitted() in flexmix?
Hi,
I was going through the examples in smartpred. It seems there's an
unstated dependency on the fitted() function in package flexmix.
n = 20
set.seed(86)
x = sort(runif(n))
y = sort(runif(n))
library(splines)
fit = lm(y ~ ns(x, df=5))
plot(x, y)
lines(x, fitted(fit)) # won't work w/o prior loading of the flexmix
package.
newx = seq(0, 1, len=n)
points(newx, predict(fit,
2005 Apr 12
1
R Package: mmlcr and/or flexmix
Greetings
I'm a relatively new R user and I'm trying to build a latent class model.
I've used the 'R Site Search' and it appears there's not much dialogue on
these packages
On mmlcr, I've gotten it working, but not sure if I'm using it correctly.
On flexmix, I can only seem to get results for one class.
I'm attaching my code below - if anyone
2011 Mar 01
1
Problem on flexmix when trying to apply signature developed in one model to a new sample
Problem on flexmix when trying to apply signature developed in one model to a new sample.
Dear
R Users, R Core Team,
I have a problem when trying to know the
classification of the tested cases using two variables with the function of flexmix:
After importing the database and creating
a matrix:
BM<-cbind(Data$var1,Data$var2)
I see that the best model has 2 groups and
use:
ex2
2009 Sep 22
3
problem using KLdiv - flexmix
I am receiving the following error while executing KLdiv method:
kl<-KLdiv(y)
Error in function (classes, fdef, mtable) :
unable to find an inherited method for function "KLdiv", for signature
"data.frame"
the code is as follows:
require(flexmix)
KLdiv(y)
the object y (snippet, actual object contains 188 entries) is as follows:
s1p5 s2p5
1 0.6 0.8
2 0.8
2007 Apr 16
1
flexmix glm warning
Dear R-helpers & Friedrich Leisch,
I'm trying to fit a mixture of regression models on attached data set
by doing the following:
agl <- read.table("agl.txt")
mod1 <- flexmix(resp~gng+csc|Subject,data=agl,
model=FLXglm(family="binomial"),k=2)
The result is a (varying) number of the following warnings:
Warning messages:
1: non-integer #successes in a
2009 Nov 03
1
fitting a confined mixture model
Hello all,
I would like to fit a mixture model whose components are normal
distributions confined in a closed interval. Since there are already
several packages for EM, I would like to extend one of these instead of
writing a new script from scratch. What would be the best way to
customize such an existing package for doing that? Which one is the best
in terms of extensibility? (e.g mixtools,
2003 Nov 29
3
performance gap between R 1.7.1 and 1.8.0
Dear R-help,
A colleague of mine was running some code on two of our boxes, and noticed a
rather large difference in running time. We've so far isolated the problem
to the difference between R 1.7.1 and 1.8.0, but not more than that. The
exact same code took 933.5 seconds in 1.7.1, and 3594.4 seconds in 1.8.1, on
the same box.
Basically, the code calls boot() to bootstrap fitting mixture