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Questions tagged [mixture-model]

In statistics, a mixture model is a probabilistic model that is formed by a combination of probabilistic models. For example, the Gaussian mixture model is the weighted sum of Gaussian distributions. Mixture models are mainly used in probabilistic clustering of data and modelling of unknown distributional shapes.

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Implementation of EM algorithm for Gaussian Mixture Models using Matlab

Using the EM algorithm, I want to train a Gaussian Mixture model with four components on a given dataset. The set is three dimensional and contains 300 samples. The problem is that after about 6 rounds of the EM algorithm, the covariance matrices…
evolved
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mixAK getProfiles bug?

From the vignette http://www.jstatsoft.org/v59/i12/paper, page 9... library("mixAK") data("PBC910", package = "mixAK") tail(PBC910)[, c(1, 2, 3, 6:9)] ...all well and good so far, as this gives the documented output (page 9). Then the following is…
Big Old Dave
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Changing gmdistribution.fit bin size

I am currently using the gaussian mixture model to fit some data I have in matlab. I am using the gmdistribution.fit function, and have a question regarding the fit. The following code is used to generate the PDF. %Plot ECDFHIST [ecdf_f,ecdf_x] =…
MichaelD
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R: unexpected behavior of the fdwm() function (evmix package)

I am trying to fit a dynamic mixture model (Weibull for the bulk, Pareto for the tail) using the fdwm() function from the evmix…
Antoine
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Filename length limit in mixture

c_program_to_find_fibonacci_series_using_loop.html tried this filename and mixture giving page not found error when I removed some letters from it then it shows the page. I think this is not limit for filenames. atleast 255 letters can be used. Is…
akshay bhange
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ggplot - plotting posterior probabilities with gradient colouring

With the code below, I split a dataset into two classes and then ggplot the points, colour-labelling each as class 1 or 2. Question: How can I instead use a gradient colouring to show the posterior probability, data_f.k2$posterior, of each point…
Zhubarb
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Flexmix driver for pscl hurdle model

I've been trying to code in R a finite mixture of hurdle models using pscl's hurdle implementation. My interest is in particular in the hurdle with negative binomial for the count data. I've come across the flexmix package, which unfortunately does…
Iliya Markov
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PCA on Sift desciptors and Fisher Vectors

I was reading this particular paper http://www.robots.ox.ac.uk/~vgg/publications/2011/Chatfield11/chatfield11.pdf and I find the Fisher Vector with GMM vocabulary approach very interesting and I would like to test it myself. However, it is totally…
T Stsn.
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plotting with coordProj of package mclust in R, how to change the symbols and colors in the "errors" plot

I am using the coordProj function of package mclust, when you plot with the option "errors" I want to change the symbols and colors. My code library("mclust") data(iris) init=sample(1:3,length(iris[,5]),replace=TRUE) est <- meVVV(iris[,-5],…
Cohet
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gaussian mixture model (GMM) mllib Apache Spark Scala

I do not think gaussian mixture model is available in mllib yet. I am wondering if any good Scala/Java implementation of GMM (suitable for large data) is available elsewhere. Please let me know. Thanks and regards,
learning_spark
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How do I extract information from multiple gaussians fitted into my data in R?

I have sequencing run information (for 4 nucleotides) that I have extracted from the .ab1 file. I want to be able to fit four multi-peak Gaussian distributions into the data (corresponding to 4 different nucleotides) Data is a csv file with five…
Anurag Mishra
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Estimate the color distribution by Guassian mixture model

I have an Image and i want to estimate the color distribution of the input image by a Gaussian Mixture Model, how i can do it with Matlab? myImage = imread('Jellyfish.jpg'); gmdistribution.fit(X,k) is not work for me, because X must be a 2D Matrix…
AliSh
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How to give label for cluster from GMM iteration?

I read the concept of GMM from Understanding concept of Gaussian Mixture Models. It is helpful for me. I have implemented GMM for fisheriris also but I didn't use fitgmdist function because I didn't have it. So I used code from…
Hany Ferdinando
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Mean and median calculation of a Gaussian Mixture Model in MATLAB

How can I calculate the mean and median of a Gaussian Mixture Model with three components like the following parameters in MATLAB: Priors[0.4,0.25,0.34] Centers [0.44;0.74;0.05] Co-variance [0.03,0.18,0.03] Thanks
user3278640
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How to construct and plot uni-variate Gaussian Mixture using its parameters in Python

I want to construct and 1D plot a uni-variate Gaussian Mixture with say three components in Python where I already have its parameters including mu,sigma,mix coefficients. What I am after has an equivalent in MATLAB i.e. gmdistribution(mu,sigma,p) I…
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