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

["Yanbo Liang (JIRA)" <ji...@apache.org>]

Yanbo Liang created SPARK-9003:
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             Summary: 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


MLlib/Vector is short of map/update function 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 a Vector as return value, we can only code as:
val b = Vectors.dense(a.toArray.map(math.log))
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 function. I think Vector should also has map/update.



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