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https://issues.apache.org/jira/browse/MATH-486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12983585#action_12983585
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Dimitri Pourbaix commented on MATH-486:
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What about the reciprocity of these two
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https://issues.apache.org/jira/browse/MATH-416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12910062#action_12910062
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Dimitri Pourbaix commented on MATH-416:
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The (n-1)-ary product is a generalization
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https://issues.apache.org/jira/browse/MATH-416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix resolved MATH-416.
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Fix Version/s: Nightly Builds
Resolution: Fixed
Javadoc updated to make clear
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https://issues.apache.org/jira/browse/MATH-416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12909140#action_12909140
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Dimitri Pourbaix commented on MATH-416:
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Returning V such that det(V) is always +1
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https://issues.apache.org/jira/browse/MATH-413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12904963#action_12904963
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Dimitri Pourbaix commented on MATH-413:
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In light of all these problems, we should
: Dimitri Pourbaix
Assignee: Dimitri Pourbaix
Fix For: Nightly Builds
A comparison with a Fortran version of Levenberg-Marquardt reveals that when
observations have different weights, the 2.1 version reaches a value of the
function which does not necessary correspond
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https://issues.apache.org/jira/browse/MATH-406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix resolved MATH-406.
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Resolution: Fixed
Wrong weight handling in Levenberg-Marquardt
: Dimitri Pourbaix
Assignee: Dimitri Pourbaix
Fix For: Nightly Builds
Levenberg-Marquardt (its method doOptimize) returns a VectorialPointValuePair.
However, the class holds the optimum point, the vector of the objective
function, the cost and residuals. The value
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https://issues.apache.org/jira/browse/MATH-405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix updated MATH-405:
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Attachment: MATH-405.patch
Correction patch
Inconsistent result from Levenberg-Marquardt
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https://issues.apache.org/jira/browse/MATH-405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix resolved MATH-405.
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Resolution: Fixed
Inconsistent result from Levenberg-Marquardt
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https://issues.apache.org/jira/browse/MATH-383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12892326#action_12892326
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Dimitri Pourbaix commented on MATH-383:
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Could you supply with a matrix which causes
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https://issues.apache.org/jira/browse/MATH-377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix resolved MATH-377.
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Resolution: Fixed
weight versus sigma in AbstractLeastSquares
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https://issues.apache.org/jira/browse/MATH-377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix updated MATH-377:
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Attachment: Math377fix.diff
Patch to correct issue MATH-377. The change in getChiSquare let
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https://issues.apache.org/jira/browse/MATH-377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12880848#action_12880848
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Dimitri Pourbaix commented on MATH-377:
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Indeed, the confusion comes from the fact
: Dimitri Pourbaix
Fix For: 2.2
In AbstractLeastSquares, residualsWeights contains the WEIGHTS assigned to each
observation. In the method getRMS(), these weights are multiplicative as they
should. unlike in getChiSquare() where it appears at the denominator! If the
weight
Issue Type: Wish
Reporter: Dimitri Pourbaix
Priority: Minor
The library http://www.ee.ucl.ac.uk/~mflanaga/java/ offers a constrained
version of the Nelder-Mead simplex method through the addition of a penalty
function. Such a possibility seems to be missing
.
Dimitri Pourbaix *
Institut d'Astronomie et d'Astrophysique * Don't worry, be happy
CP 226, office 2.N4.211, building NO * and CARPE DIEM.
Universite Libre de Bruxelles*
Boulevard du Triomphe* Tel : +32-2-650.35.71
B-1050
Project: Commons Math
Issue Type: Bug
Affects Versions: Nightly Builds
Reporter: Dimitri Pourbaix
Assignee: Dimitri Pourbaix
When SVD is applied to a strongly rectangular matrix (number of rows way larger
than number of columns, typical case
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https://issues.apache.org/jira/browse/MATH-342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix resolved MATH-342.
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Resolution: Fixed
Fix Version/s: Nightly Builds
The two identified troublesome
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https://issues.apache.org/jira/browse/MATH-333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix resolved MATH-333.
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Resolution: Fixed
eigenvectors computation is wrong when several vectors share the same
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https://issues.apache.org/jira/browse/MATH-333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix updated MATH-333:
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Attachment: SingularValueDecompositionImpl.java
EigenDecompositionImpl.java
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https://issues.apache.org/jira/browse/MATH-333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dimitri Pourbaix updated MATH-333:
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Attachment: MATH-333_320.patch
The attached file is the result 'svn diff' from trunk
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