[
https://issues.apache.org/jira/browse/FLINK-1737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736451#comment-14736451
]
ASF GitHub Bot commented on FLINK-1737:
---------------------------------------
Github user rmetzger commented on the pull request:
https://github.com/apache/flink/pull/1078#issuecomment-138826497
Your build is failing due to scalastyle checks
```
[INFO]
[INFO] --- maven-failsafe-plugin:2.17:verify (default) @ flink-ml ---
[INFO] Failsafe report directory:
/home/travis/build/apache/flink/flink-staging/flink-ml/target/failsafe-reports
[INFO]
[INFO] --- scalastyle-maven-plugin:0.5.0:check (default) @ flink-ml ---
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=101
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=108
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=111
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=118
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=125
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=132
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=136
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=139
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/DenseVectorSuite.scala
message=File line length exceeds 100 characters line=146
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=151
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=158
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=162
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=169
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=176
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=180
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=183
error
file=/home/travis/build/apache/flink/flink-staging/flink-ml/src/test/scala/org/apache/flink/ml/math/SparseVectorSuite.scala
message=File line length exceeds 100 characters line=190
Saving to
outputFile=/home/travis/build/apache/flink/flink-staging/flink-ml/scalastyle-output.xml
Processed 64 file(s)
Found 17 errors
```
> Add statistical whitening transformation to machine learning library
> --------------------------------------------------------------------
>
> Key: FLINK-1737
> URL: https://issues.apache.org/jira/browse/FLINK-1737
> Project: Flink
> Issue Type: New Feature
> Components: Machine Learning Library
> Reporter: Till Rohrmann
> Assignee: Daniel Pape
> Labels: ML, Starter
>
> The statistical whitening transformation [1] is a preprocessing step for
> different ML algorithms. It decorrelates the individual dimensions and sets
> its variance to 1.
> Statistical whitening should be implemented as a {{Transfomer}}.
> Resources:
> [1] [http://en.wikipedia.org/wiki/Whitening_transformation]
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