Displaying 20 results from an estimated 2000 matches similar to: "DOING CLUSTERING WITH THE EM ALGORITHM"
2005 May 26
3
Buidling R on Linux (Itanium) fails (PR#7897)
Full_Name: Reinhold Bader
Version: 2.1.0
OS: SLES 9
Submission from: (NULL) (129.187.48.1)
I tried to build R using the Intel compilers (icc, ifort) and the Math Kernel
Libraries
for BLAS/LAPACK
Optimizations used were -O3, and the
FPICFLAGS="-fpic"
was exported.
The build failed with the following error message:
...
dumping R code in package 'methods'
Saving namespace image
2005 May 20
3
constrained optimization
Hello,
I've got to compute a minimization equation under an equality constraint
(Min g(x1,x2,x3) with x1+x2=const). The Constroptim function does not
authorize an equality condition but only inequality conditions. Which
function can I use instead?
Thank you very much for your help.
Gael Robert - +33 1 42 14 27 96
******************************************************************
This
2005 Sep 23
4
books about MCMC to use MCMC R packages?
Dear list users,
I need to learn about MCMC methods, and since there are several packages in
R that deal with this subject, I want to use them.
I want to buy a book (or more than one, if necessary) that satisfies the
following requirements:
- it teaches well MCMC methods;
- it is easy to implement numerically the ideas of the book, and notation
and concepts are similar to the corresponding R
2005 Sep 20
1
Xgird, R, parallel computing
Hi, list,
Sorry if I am bothering you.
I am interested in using xgrid with R for distributed computing. I am using
MacOS X and my R 2.1. 1 is already installed and running. The client
computers are all of the same type and the same version of R has been
installed on them.
We have also set up xgrid on my system and client computers as well.
I am wondering if any one can give me some clues
2005 Nov 08
1
Hybrid Monte Carlo algorithm (MCMC)
Hi all,
I'm trying to estimate a nested model (purchase decision, cloglog formula, &
quantity bought given a purchase, truncated Poisson). Some of the parameters
are mixed (6) and 4 are fixed for all the respondent.
The simulated ML (500 simulations) method forwards highly correlated
estimates.
After some research, Hybrid Monte Carlo seems to be a good alternative to
estimate the model. I
2005 Nov 13
1
correlating irregular time series
I have some time stamped events that are supposed to be unrelated.
I have plotted them and that assumption does not appear to be valid.
http://metrak.com/tmp/sevents.png is a plot showing three sets of events
over time. For the purpose of this exercise, the Y value is irrelevant.
The series are not sampled at the same time and are not equispaced
(just events in a log file).
The plot is
2005 Dec 07
1
Dots argument in apply method
Hello everyone,
I'm working on a package using S4 classes and methods and I ran into the
following "problem" when I tried to create an "apply" method for objects
of one of my new classes. I've found a way around the problem but I
wonder if I did not paint myself into the corner. I'd like your opinion
about that.
So I have an object "myObj" of class
2005 Jul 21
1
About object of class mle returned by user defined functions
Hi,
There is something I don't get with object of class "mle" returned by a
function I wrote. More precisely it's about the behaviour of method
"confint" and "profile" applied to these object.
I've written a short function (see below) whose arguments are:
1) A univariate sample (arising from a gamma, log-normal or whatever).
2) A character string
2007 Jul 18
2
EM unsupervised clustering
Hi All,
I have a n x m matrix. The n rows are individuals, the m columns are variables.
The matrix is in itself a collection of 1s (if a variable is observed for an
individual), and 0s (is there is no observation).
Something like:
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 1 0 1 1 0 0
[2,] 1 0 1 1 0 0
[3,] 1 0 1 1 0 0
[4,] 0 1 0
2004 Nov 16
2
help on EM Algorithm for bivariate normal
Hi,
I woul like to know if it is possible to have a "R code" to generate EM
Algorithm for a normal bivariate mixture.
Best regard,
S.F.
2005 Mar 07
3
R crashes using the em function of package mclust (PR#7719)
Hi,
I got the same problem like
http://tolstoy.newcastle.edu.au/R/devel/04/11/1204.html
R crashes when I use the em function from the mclust package on
univariate data and on a special case on bivariate data (when the matrix
is not provided as written in the manual).
It seems as if the problem is the format of the data to be analyzed.
Operating System: Windows XP (SP2)
R version: R-2.0.1
The
2005 Jan 27
1
Cluster analysis using EM algorithm
Hi,
I am looking for a package to do the clustering analysis using the
expectation maximization algorithm.
Thanks in advance.
Ming
2009 May 21
1
em algorithm mixture of multivariate normals
Hi,
I would like to know if it is possible to have a "R code" to estimate the
parameters of a mixture of bivariate (or multivariate) normals via EM
Algorithm. I tried to write it, but in the estimation of the matrix of
variance and covariance, i have some problems. I generate two bidimensional
vectors both from different distribution with their own vector means and
variance and
2009 Jan 16
1
installing mclust and flexmix on linux
I've been trying to install some R packages such as mclust and flexmix on linux but have had the following error messages.
> I've been trying to install mclust on my notebook which has linpus linux lite os and I have installed R as well as some packages all right. However, when I tried to install mclust, it gave me the following messages. Any suggestions?
Tim
++++++++++++++++
2011 Sep 04
2
mclust: modelName="E" vs modelName="V"
Hi,
I'm trying to use the library mclust for gaussian mixture on a numeric
vector. The function Mclust(data,G=3) is working fine but the fitting is not
optimal and is using modelNames="E". When I'm trying
Mclust(data,G=3,modelName="V") I have the following message:
Error in if (Sumry$G > 1) ans[c(orderedNames, "z")] else ans[orderedNames] :
argument is
2004 Oct 19
1
Windows XP crashes when running the EM algorithm in MCLUST
Whenever I submit the following command >result <- em("E", m1, mu=c(25, 50),
sigmasq=10, pro=c(0.49,0.51)) in MCLUST , I experience a problem with my
Windows XP. Has anyone had this type of problem?
I receive the general "send report" dialogue box and my program is no longer
able to run. Should I change any of my system settings? Let me know if you
think of anything
2005 Sep 08
1
clustering: Multivariate t mixtures
Hi,
Before I write code to do it does anyone know of code for fitting
mixtures of multivariate-t distributions.
I can't use McLachan's EMMIX code because the license is "For non
commercial use only".
I checked, mclust and flexmix but both only do Gaussian.
Thanks
Nicholas
2008 Jul 08
1
about EM algorithm
Hi, dear R experts .
is there any package contain an universal EM procedure,
that is , for arbitrary d.f. , not just the one in mclust .
thanks in advance
best regards
-----------------------------------------------
Peng Jiang ?? ,Ph.D. Candidate
Antai College of Economics & Management
????????
Department of Mathematics
???
Shanghai Jiaotong University (Minhang Campus)
800 Dongchuan Road
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
2009 Jul 20
2
EM Clustering
Hi all,
could someone send me examples of the EM Clustering algorithm and/or
some pdf describing it?
Thanks,
Douglas Sousa.