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https://issues.apache.org/jira/browse/SPARK-7247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin closed SPARK-7247.
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Resolution: Won't Fix
> Add Pandas' shift method to the Dataframe API
> ---------------------------------------------
>
> Key: SPARK-7247
> URL: https://issues.apache.org/jira/browse/SPARK-7247
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 1.3.1
> Reporter: Olivier Girardot
> Priority: Minor
>
> Spark's DataFrame provide several of the capabilities of Pandas and R
> Dataframe but in a distributed fashion which makes it almost easy to rewrite
> Pandas code to Spark.
> Almost, but there is a feature that's difficult to workaround right now,
> that's the shift method :
> http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.shift.html
> I'm working with some data scientists that are using this feature a lot in
> order to check for "rows equality" after a sort by some keys. Example (in
> pandas) :
> {code}
> df['delta'] = (df.START_DATE.shift(-1) - df.END_DATE).astype('timedelta64[D]')
> {code}
> I think this would be troublesome to add, I don't even know if this change
> would be do-able. But as a user, it would be useful for me.
> Olivier.
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