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https://issues.apache.org/jira/browse/MATH-1100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luc Maisonobe resolved MATH-1100.
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Resolution: Invalid
Fix Version/s: 3.3
As per comments above, specifying the threshold allows to correctly identify
the rank.
> QR factorization fails in revealing rank-deficient matrix
> ---------------------------------------------------------
>
> Key: MATH-1100
> URL: https://issues.apache.org/jira/browse/MATH-1100
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.2
> Environment: Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode,
> sharing) an windows 7 professional
> Reporter: alberto trivellato
> Fix For: 3.3
>
> Attachments: QRtest.zip
>
>
> given a matrix that has not full rank, the method getSolver().isNonSingular()
> of the class QRDecomposition returns true.
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