Aleksey Zinoviev created IGNITE-9145:
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Summary: [ML] Add different strategies to index labels in
StringEncoderTrainer
Key: IGNITE-9145
URL: https://issues.apache.org/jira/browse/IGNITE-9145
Project: Ignite
Issue Type: Improvement
Components: ml
Reporter: Aleksey Zinoviev
Assignee: Aleksey Zinoviev
Fix For: 2.7
The main idea to add a few strategies of indexing: sorting and so on.
Currently it supports only one strategy (most popular with zero and less
popular with the max index size).
There are can be a few options
* 'frequencyDesc': descending order by label frequency (most frequent label
assigned 0)
* 'frequencyAsc': ascending order by label frequency (least frequent label
assigned 0)
* 'alphabetDesc': descending alphabetical order
* 'alphabetAsc': ascending alphabetical order
Please, update the method **transformFrequenciesToEncodingValues and add the
strategy as a parameter of trainer.
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