Mahout: FileDataModel

FileDataModel is used to encapsulate recommender data stored in a file. Each line in the file must follow below format.

userID,itemID[,preference[,timestamp]]

userID and itemId are long values.

preference is a double value, it is optional.

Timestamp is a long value.

An empty line, or one that begins with '#' will be ignored as a comment.

Note:

All the items in the file must express no preference, or the all must.

Go through “First Recommender Engine” example.

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