Feynman Liang created SPARK-8473:
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Summary: Documentation for DCT
Key: SPARK-8473
URL: https://issues.apache.org/jira/browse/SPARK-8473
Project: Spark
Issue Type: New Feature
Components: ML
Reporter: Feynman Liang
Priority: Minor
Documentation detailing the DCT feature transformer needs to be provided. In
particular, we need to:
- Describe how the implementation used scales the transform such that the
representing matrix for the transform is unitary
- Document how the frequency bins are arranged (e.g. index 0 corresponds to
the DC offset). In MATLAB terminology, the implementation does not perform a
fftshift after transforming.
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