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https://issues.apache.org/jira/browse/SYSTEMML-2408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm updated SYSTEMML-2408:
-------------------------------------
Issue Type: Bug (was: Task)
> Invalid empty input handling on fused mmchain XtXvy w/ minus
> ------------------------------------------------------------
>
> Key: SYSTEMML-2408
> URL: https://issues.apache.org/jira/browse/SYSTEMML-2408
> Project: SystemML
> Issue Type: Bug
> Reporter: Matthias Boehm
> Priority: Major
>
> We compile a single fused mmchain operator of type XtXvy but this
> implementation did not properly handle empty right hand side vectors (here
> combined_weights) in case of minus.
> {code}
> residuals = local_X %*% combined_weights - X[,1]
> res_A = t(local_X) %*% residuals
> {code}
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