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https://issues.apache.org/jira/browse/MADLIB-1002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Frank McQuillan updated MADLIB-1002:
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Assignee: (was: Nandish Jayaram)
> Sessionization - Phase 3 (minimum time)
> ---------------------------------------
>
> Key: MADLIB-1002
> URL: https://issues.apache.org/jira/browse/MADLIB-1002
> Project: Apache MADlib
> Issue Type: New Feature
> Components: Module: Utilities
> Reporter: Frank McQuillan
> Priority: Minor
> Labels: gsoc2016, starter
> Fix For: v1.9.2
>
>
> Story
> As a data scientist, I want to perform session reconstruction on my data set,
> so that I can prepare for input into other algorithms like path functions, or
> predictive analytics algorithms.
> This is a follow on to
> https://issues.apache.org/jira/browse/MADLIB-909
> https://issues.apache.org/jira/browse/MADLIB-1001
> to add minimum time.
> Details
> Add min time to the existing params:
> params (optional)
> TEXT, default: NULL. Parameters for sessionization in a comma-delimited
> string of key-value pairs. See the description below for details.
> Parameters
> Parameters in this section are supplied in the params argument as a string
> containing a comma-delimited list of key-value pairs. All of these named
> parameters are optional, and their order does not matter. You must use the
> format <param_name> = <value> to specify the value of a parameter, otherwise
> the parameter is ignored.
> {code}
> ‘output_all_cols = <value>, -- existing param
> create_view = <value>, -- existing param
> min_time = <value>'
> {code}
> Parameters
> min_time (optional)
> FLOAT Minimum delta time that must elapse between events in order for this
> session to be considered a real (human) session (default=0). User should
> specify in the same units as the time_out parameter. Usage: if an event
> happens less than min_time, do not include the event in the current session.
> When you look at the next event, compare against the last valid session
> event, not against the one you just dropped.
> For an example of how min_time could work, see Aster Analytics sessionization
> function [1].
> References
> [4] Aster Analytics users guide, see "sessionize" function
> http://www.info.teradata.com/edownload.cfm?itemid=143450001
> http://www.info.teradata.com/templates/eSrchResults.cfm?txtpid=&txtrelno=&prodline=all&frmdt=&txtsrchstring=aster%20analytics&srtord=Desc&todt=&rdSort=Date
> https://www.youtube.com/watch?v=C760M9ttK9Q
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