GitHub user iyerr3 opened a pull request:

    https://github.com/apache/incubator-madlib/pull/171

    DT: Correctly encode unseen categorical features

    Changes applied in commit a2f4740 added an option to treat NULL values
    as a new category. This was applied by changing the encoding process of
    categorical features to add a new value at the end of the list of
    values. The intention with the commit was to treat new unseen, non-null
    values equivalent to NULL. The encoding process, however, still encoded
    the unseen categorical value as -1, which is interpreted as NULL in
    underlying functions. This commit updates this process to correctly use
    the last index as the encoding for the unseen/NULL value.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/iyerr3/incubator-madlib 
bugfix/dt_unseen_encoding

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-madlib/pull/171.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #171
    
----
commit 9f8722f410974ef27564623f44891ac2f95fd487
Author: Rahul Iyer <ri...@apache.org>
Date:   2017-08-18T16:06:20Z

    DT: Correctly encode unseen categorical features
    
    Changes applied in commit a2f4740 added an option to treat NULL values
    as a new category. This was applied by changing the encoding process of
    categorical features to add a new value at the end of the list of
    values. The intention with the commit was to treat new unseen, non-null
    values equivalent to NULL. The encoding process, however, still encoded
    the unseen categorical value as -1, which is interpreted as NULL in
    underlying functions. This commit updates this process to correctly use
    the last index as the encoding for the unseen/NULL value.

----


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