[jira] [Resolved] (SPARK-9003) Add map/update function to MLlib/Vector

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-9003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-9003.
---------------------------------
    Resolution: Incomplete

> Add map/update function to MLlib/Vector
> ---------------------------------------
>
>                 Key: SPARK-9003
>                 URL: https://issues.apache.org/jira/browse/SPARK-9003
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>            Reporter: Yanbo Liang
>            Priority: Minor
>              Labels: bulk-closed
>
> MLlib/Vector only support foreachActive function and is short of map/update which is inconvenience for some Vector operations.
> For example:
> val a = Vectors.dense(...)
> If we want to compute math.log for each elements of a and get Vector as return value, we can only code as:
> val b = Vectors.dense(a.toArray.map(math.log))
> or we can use "toBreeze" and "fromBreeze" make transformation with breeze API.
> The code snippet is not elegant, we want it can implement:
> val c = a.map(math.log)
> Also currently MLlib/Matrix has implemented map/update/foreachActive function. I think Vector should also has map/update.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org