Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simple multithreaded implementation of the EM algorithm for mixture
  models   Finite mixture models have been widely used for the modelling and analysis of
data from heterogeneous populations. Maximum likelihood estimation of the
parameters is typically carried out via the Expectation-Maximization (EM)
algorithm. The complexity of the implementation of the algorithm depends on the
parametric distribution that is adopted as the component densities of the
mixture model. In the case of the skew normal and skew t-distributions, for
example, the E-step would involve complicated expressions that are
computationally expensive to evaluate. This can become quite time-consuming for
large and/or high-dimensional datasets. In this paper, we develop a
multithreaded version of the EM algorithm for the fitting of finite mixture
models. Due to the structure of the algorithm for these models, the E- and
M-steps can be easily reformulated to be executed in parallel across multiple
threads to take advantage of the processing power available in modern-day
multicore machines. Our approach is simple and easy to implement, requiring
only small changes to standard code. To illustrate the approach, we focus on a
fairly general mixture model that includes as special or limiting cases some of
the most commonly used mixture models including the normal, t-, skew normal,
and skew t-mixture models.

15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc