Train an ElasticNet model
Trainer of an elastic net model. Fit model with coordinate descent.
Define the training design, i.e. the target Y to use for the model.
The name of the 'columns' or 'row_tag keys' to use as targets or labels.
The origin of the target. Notice: Targets comming from a 'row_tag' are always considered as categorical.
The type of the target (categorical or numerical). Set 'auto' to infer the correct type. Notice: targets comming from row_tags are allways considered as categorical