Support per-rating holdouts for crossfolding

[ghost]

(originally reported in Trac by @elehack on 2012-08-14 18:58:40)

The crossfolder should support per-rating, as well as per-user, holdout strategies so we can compare them more systematically.

Note: This issue has been automatically migrated from Bitbucket
Created by grouplens on 2013-02-01T22:09:51.364493+00:00, last updated: 2013-04-22T18:32:44.276539+00:00

[ghost]

Merged in LingfeiH/lenskit (pull request #112, closes #205)

Support per-rating holdouts for crossfolding

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Note: This comment has been automatically migrated from Bitbucket
Created by @elehack on 2013-04-22T18:32:44.271262+00:00, last updated: None