Please explain the sparse vector in Spark.

Spark - Interview Questions

A sparse vector is used for storing non-zero entries for saving space. It has two parallel arrays :

* One for indices

* The other for values

An example of a sparse vector is as follows :

Vectors.sparse(7,Array(0,1,2,3,4,5,6),Array(1650d,50000d,800d,3.0,3.0,2009,95054))

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