GitHub user mpetruska opened a pull request:
https://github.com/apache/spark/pull/19659
[SPARK-19668][ML] Multiple NGram sizes
## What changes were proposed in this pull request?
[Jira ticket](https://issues.apache.org/jira/browse/SPARK-19668):
- implements extraction of multiple sizes of ngrams with `feature.NGram`
## How was this patch tested?
- unit tests were added for the implementation (`multiSliding` function)
- test cases were added to `NGramSuite` and `Word2VecSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mpetruska/spark SPARK-19668
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19659.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 #19659
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commit 11f26f40b5f3d7325b6da3f7b32b0fd4db0449ee
Author: Mark Petruska <petruska.m...@gmail.com>
Date: 2017-11-04T11:34:39Z
implements NGram over a range of values
commit 74fee5531a605fcc876dd7864713ba28e0d4ad71
Author: Mark Petruska <petruska.m...@gmail.com>
Date: 2017-11-04T13:04:17Z
adds tests for multiSliding
commit 0364a56ef6d71939a4db5d81f8ce0e68c1ecd546
Author: Mark Petruska <petruska.m...@gmail.com>
Date: 2017-11-04T13:17:57Z
adds additional tests for multi-length ngram interactions
commit 96e2a6267002d263927ecb99f5d46642a5c4df4d
Author: Mark Petruska <petruska.m...@gmail.com>
Date: 2017-11-04T13:18:18Z
adds maxN parameter to NGram examples
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