GitHub user WeichenXu123 opened a pull request:
https://github.com/apache/spark/pull/15716
[SPARK-18201] add toDense and toSparse into Matrix trait, like Vector design
## What changes were proposed in this pull request?
add toDense and toSparse into Matrix trait, like Vector design
so that when we have a Matrix object `matrix: Matrix`, maybe dense or
sparse,
we can call `matrix.toDense` to get DenseMatrix
and call `matrix.toSparse` to get SparseMatrix
## How was this patch tested?
N/A
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/WeichenXu123/spark
add_toDense_toSparse_into_matrix_base
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15716.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #15716
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commit 102fa83866ef03f75c6198cb9a026822af90e1f2
Author: WeichenXu <weichenxu...@outlook.com>
Date: 2016-11-01T02:31:46Z
init pr
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