abstract = "We describe an R package which implements grammatical
evolution (GE) for automatic program generation. By
performing an unconstrained optimization over a
population of R expressions generated via a
user-defined grammar, programs which achieve a desired
goal can be discovered. The package facilitates the
coding and execution of GE programs, and supports
parallel execution. In addition, three applications of
GE in statistics and machine learning, including
hyper-parameter optimization, classification and
feature generation are studied",