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https://issues.apache.org/jira/browse/SPARK-1892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiangrui Meng closed SPARK-1892.
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Resolution: Duplicate
> Add an OWL-QN optimizer for L1 regularized optimizations.
> ---------------------------------------------------------
>
> Key: SPARK-1892
> URL: https://issues.apache.org/jira/browse/SPARK-1892
> Project: Spark
> Issue Type: New Feature
> Components: MLlib
> Reporter: Sung Chung
>
> OWL-QN is a modified version of LBFGS to handle L1 regularization.
> The original paper is at
> http://machinelearning.wustl.edu/mlpapers/paper_files/icml2007_AndrewG07.pdf
> This implementation extends LBFGS and uses the OWL-QN implementation from
> breeze.
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