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Jerry Z edited comment on SPARK-9744 at 8/7/15 6:14 PM: -------------------------------------------------------- Let me know if I'm missing/doing more work than necessary..... 1. zip with index 1.5. flip pair so the key is the index 2. map with -1 to the index 3. repeat this process with however many back I need 4. join RDD pairs (resulting in a chain of pairs, which is annoying with how long the line becomes when filling in the text between the<>) 5. another map function doing the operation you wanted to do with those values was (Author: mrunowen): Let me know if I'm missing/doing more work than necessary. 1. zip with index 1.5. flip pair so the key is the index 2. map with -1 to the index 3. repeat this process with however many back I need 4. join RDD pairs (resulting in a chain of pairs, which is annoying with how long the line becomes when filling in the text between the<>) 5. another map function doing the operation you wanted to do with those values > Add Java RDD method to map with lag and lead > -------------------------------------------- > > Key: SPARK-9744 > URL: https://issues.apache.org/jira/browse/SPARK-9744 > Project: Spark > Issue Type: Wish > Reporter: Jerry Z > Priority: Minor > > To avoid zipping with index and doing numerous mapping and joins, having a > single method call to map with an additional two parameters (1: list of > offsets [(-) for lag, 0 for current and (+) for lead])) and (2:default > value). The other difference to the map function takes an argument of List<T> > and not just T. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org