Programmer Guide/Command Reference/EVAL/density: Difference between revisions
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:;<var>sigmatable</var>:covariance vectors (i.e. diagonal of covariance matrices) of mixture model (N<sub>mixtures</sub> x N<sub>dimensions</sub>) | :;<var>sigmatable</var>:covariance vectors (i.e. diagonal of covariance matrices) of mixture model (N<sub>mixtures</sub> x N<sub>dimensions</sub>) | ||
:;<var>wtable</var>:vector of mixture weights | :;<var>wtable</var>:vector of mixture weights | ||
:;<var>accurate</var> | :;<var>accurate</var>: | ||
::*if '''1''', the accurate log-likelihood estimation is used | ::*if '''1''', the accurate log-likelihood estimation is used | ||
::*otherwise use the Intel IPP fast log. add method | ::*otherwise use the Intel IPP fast log. add method | ||
:;<var>divbylength</var> | :;<var>divbylength</var>: | ||
::*if '''1''', divide overall log-likelihood by number of observations | ::*if '''1''', divide overall log-likelihood by number of observations | ||
::*otherwise not | ::*otherwise not | ||
:;<var>framell</var> | :;<var>framell</var>: | ||
::*if '''1''', log-likelihoods are calculated for each individual frame | ::*if '''1''', log-likelihoods are calculated for each individual frame | ||
::*otherwise they are summed up | ::*otherwise they are summed up | ||
:;<var>lowerquantile</var>if a value is provided, likelihood values below this value are discarded | :;<var>lowerquantile</var>:if a value is provided, likelihood values below this value are discarded | ||
:;<var>upperquantile</var>if a value is provided, likelihood values above this value are discarded | :;<var>upperquantile</var>:if a value is provided, likelihood values above this value are discarded | ||
;Result: Joint log-likelihood, for each frame (if ''framell''=0) or summed up (if ''framell''=1) and divided by number of observations (if ''divbylength''=1). | ;Result: Joint log-likelihood, for each frame (if ''framell''=0) or summed up (if ''framell''=1) and divided by number of observations (if ''divbylength''=1). | ||
;See also: [[../haclust|haclust]], [[../modclust|modclust]], [[../em|em]], [[../svd|svd]] | ;See also: [[../haclust|haclust]], [[../modclust|modclust]], [[../em|em]], [[../svd|svd]] | ||
[[../#Functions|<function list>]] | [[../#Functions|<function list>]] | ||
Latest revision as of 07:58, 21 April 2011
Evaluates the log-likelihood of (a) feature vector(s) for a mixture model specified in the parameters meantable, sigmatable and wtable (weights).
- Usage
density(x, meantable, sigmatable, wtable, accurate, divbylength, framell {, lowerquantile, upperquantile})- x
- input feature vectors
- meantable
- mean vectors of mixture model (Nmixtures x Ndimensions)
- sigmatable
- covariance vectors (i.e. diagonal of covariance matrices) of mixture model (Nmixtures x Ndimensions)
- wtable
- vector of mixture weights
- accurate
-
- if 1, the accurate log-likelihood estimation is used
- otherwise use the Intel IPP fast log. add method
- divbylength
-
- if 1, divide overall log-likelihood by number of observations
- otherwise not
- framell
-
- if 1, log-likelihoods are calculated for each individual frame
- otherwise they are summed up
- lowerquantile
- if a value is provided, likelihood values below this value are discarded
- upperquantile
- if a value is provided, likelihood values above this value are discarded
