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Bug 295 - ColPivHouseholderQR does not really use user specified threshold
Summary: ColPivHouseholderQR does not really use user specified threshold
Status: NEW
Alias: None
Product: Eigen
Classification: Unclassified
Component: QR (show other bugs)
Version: 3.0
Hardware: All All
: --- Unknown
Assignee: Nobody
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Depends on:
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Reported: 2011-06-14 14:36 UTC by Gael Guennebaud
Modified: 2019-12-04 10:51 UTC (History)
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Description Gael Guennebaud 2011-06-14 14:36:48 UTC 
Currently user specified threshold (via setThreshold) is only used in rank() while compute() sets its own threshold:

RealScalar threshold_helper = m_colSqNorms.maxCoeff() * internal::abs2(NumTraits<Scalar>::epsilon()) / RealScalar(rows);

to compute m_nonzero_pivots. Then solve() also uses m_nonzero_pivots instead of rank().

This also this thread:

http://forum.kde.org/viewtopic.php?f=74&t=95481&sid=ed26a9f1d001dc38d354756fe962c5d3
Comment 1 Nobody 2019-12-04 10:51:46 UTC 
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