implement ability to specify specific field interaction parameters
the feature gets turned on with --ffm_interaction_matrix
then field weights can be expressed by --ffm_interaction field_id_1:field_id_2:weight
weight 0 means the interaction is fully masked out. default is weight 1.0 everywhere
field ids are sequential ids of fields as passed by field declaration parameters
WARNING: since fields are not named, this means that any change to order of field declarations requires careful adjustment of interactions too...
implement ability to specify specific field interaction parameters the feature gets turned on with --ffm_interaction_matrix then field weights can be expressed by --ffm_interaction field_id_1:field_id_2:weight
weight 0 means the interaction is fully masked out. default is weight 1.0 everywhere field ids are sequential ids of fields as passed by field declaration parameters
WARNING: since fields are not named, this means that any change to order of field declarations requires careful adjustment of interactions too...
ping @adischw