Gblinear parameters

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Few questions about gblinear:

  • Is there a parameter for feature subsetting like “colsample_bytree” for gblinear?
  • Is gblinear with default parameters functioning like an elastic net?
  • What are the range of values for alpha and lambda, they are not listed in

No, currently there is no equivalent feature for gblinear.

No, since the default values for both reg_lambda (L2 regularization) and reg_alpha (L1 regularization) default to zero. For elastic nets, set both values to nonzero.

Any non-negative values will do.

I there any way to calculate a non negative least square regression with XGBoost?