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From "Sean Owen (JIRA)" <>
Subject [jira] [Commented] (SPARK-20180) Unlimited max pattern length in Prefix span
Date Sun, 02 Apr 2017 16:53:41 GMT


Sean Owen commented on SPARK-20180:

It sounds like you're arguing for no max at all -- what do you mean? that doesn't sound right.

It's possible that you didn't quite run the tests correctly, or that a test is flaky. I wouldn't
worry about that, it's not clear this is a change to make anyway.
Again, we use pull requests to propose changes.

> Unlimited max pattern length in Prefix span
> -------------------------------------------
>                 Key: SPARK-20180
>                 URL:
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>    Affects Versions: 2.1.0
>            Reporter: Cyril de Vogelaere
>            Priority: Minor
>   Original Estimate: 0h
>  Remaining Estimate: 0h
> Right now, we need to use .setMaxPatternLength() method to
> specify is the maximum pattern length of a sequence. Any pattern longer than that won't
be outputted.
> The current default maxPatternlength value being 10.
> This should be changed so that with input 0, all pattern of any length would be outputted.
Additionally, the default value should be changed to 0, so that a new user could find all
patterns in his dataset without looking at this parameter.

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