Programmer Guide/Command Reference/EVAL/density - Revision history

193.171.195.48 at 05:58, 21 April 2011

2011-04-21T05:58:37Z

← Older revision		Revision as of 07:58, 21 April 2011
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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

193.171.195.48 at 05:58, 21 April 2011

2011-04-21T05:58:24Z

← Older revision		Revision as of 07:58, 21 April 2011
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	::*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>]]

193.171.195.48: Created page with '{{DISPLAYTITLE:{{SUBPAGENAME}}}} Evaluates the log-likelihood of (a) feature vector(s) for a mixture model specified in the parameters meantable, sigmatable and wtable (weights).…'

2011-04-21T05:58:04Z

Created page with '{{DISPLAYTITLE:{{SUBPAGENAME}}}} Evaluates the log-likelihood of (a) feature vector(s) for a mixture model specified in the parameters meantable, sigmatable and wtable (weights).…'

New page

{{DISPLAYTITLE:{{SUBPAGENAME}}}}
Evaluates the log-likelihood of (a) feature vector(s) for a mixture model specified in the parameters meantable, sigmatable and wtable (weights).
;Usage:<code>density(<var>x</var>, <var>meantable</var>, <var>sigmatable</var>, <var>wtable</var>, <var>accurate</var>, <var>divbylength</var>, <var>framell</var> {, <var>lowerquantile</var>, <var>upperquantile</var>})</code>
:;<var>x</var>:input feature vectors
:;<var>meantable</var>:mean vectors of mixture model (Nmixtures x Ndimensions)
:;<var>sigmatable</var>:covariance vectors (i.e. diagonal of covariance matrices) of mixture model (Nmixtures x Ndimensions)
:;<var>wtable</var>:vector of mixture weights
:;<var>accurate</var>
::*if '''1''', the accurate log-likelihood estimation is used
::*otherwise use the Intel IPP fast log. add method
:;<var>divbylength</var>
::*if '''1''', divide overall log-likelihood by number of observations
::*otherwise not
:;<var>framell</var>
::*if '''1''', log-likelihoods are calculated for each individual frame
::*otherwise they are summed up
:;<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
;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]]

[[../#Functions|<function list>]]