[jira] [Commented] (SYSTEMML-1679) Add a new threshold utility function

["Fei Hu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SYSTEMML-1679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16052500#comment-16052500 ] 

Fei Hu commented on SYSTEMML-1679:
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[PR 548 | https://github.com/apache/systemml/pull/548] submitted. 

> Add a new threshold utility function
> ------------------------------------
>
>                 Key: SYSTEMML-1679
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1679
>             Project: SystemML
>          Issue Type: Sub-task
>            Reporter: Mike Dusenberry
>            Assignee: Fei Hu
>
> We should add a new {{threshold}} utility function (in {{nn/util.dml}}) that accepts a matrix {{X}} and a threshold parameter {{thresh}} and returns an indicator matrix {{out}} with values in \{0, 1\} depending on whether or not the values in {{X}} are above {{thresh}}.  We could use this, for example, for determining the predicted class in a binary classification problem given the output of a sigmoid layer.
> We should also add a test case in {{nn/test/test.dml}}.



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