v0.2.8

Fixed

• Message for not implemented methods changed to reduce misunderstanding.
• Empty counter will raise error in estimating non-parameteric response function.

Changed

• matching_l1 returns frequency table instead of entire vector.
• Vectorized population compilation and used data.table for multi-thread assignment.
• Removed nested parallelism in compiling pseudo population, which results in close control on memory.
• estimate_npmetric_erf also returns optimal h and risk values.

Added

• estimate_gps returns the optimal hyperparameters.
• estimate_gps returns S3 object.
• Internal xgboost approach support verbose parameter.
• Pseudo-population object now report the parameters that are used for the best covariate balance.