GitHub user mengxr opened a pull request:
https://github.com/apache/spark/pull/685
[SPARK-1752][MLLIB] Standardize text format for vectors and labeled points
We should standardize the text format used to represent vectors and labeled
points. The proposed formats are the following:
1. dense vector: `[v0,v1,..]`
2. sparse vector: `(size,[i0,i1],[v0,v1])`
3. labeled point: `(label,vector)`
where "(..)" indicates a tuple and "[...]" indicate an array. Those are
compatible with Python's syntax and can be easily parsed using `eval`. This PR
doesn't contain changes to pyspark. I need to figure out how to change dense
array's `__str__`.
`MLUtils#saveLabeledData` and `MLUtils#loadLabeledData` are deprecated.
Users should use `RDD#saveAsTextFile` and `MLUtils#loadLabeledPoints` instead.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mengxr/spark labeled-io
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/685.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 #685
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commit 19aa5236a20aa2ad7479ed7fdd6db95cc6a6b13f
Author: Xiangrui Meng <[email protected]>
Date: 2014-05-07T20:22:13Z
update toString and add parsers for Vectors and LabeledPoint
commit 9e63a02b5fcf38c00b1634730e2f385961d0f326
Author: Xiangrui Meng <[email protected]>
Date: 2014-05-07T20:53:44Z
add loadVectors and loadLabeledPoints
commit e761d32f7ee62107bcef17fe7491ab086641ac5b
Author: Xiangrui Meng <[email protected]>
Date: 2014-05-07T21:52:17Z
make LabelPoint.parse compatible with the dense format used before v1.0 and
deprecate loadLabeledData and saveLabeledData
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