smoothed version of non-differentiable LASSO penalty
.smoothLASSOValue(parameters, tuningParameters, penaltyFunctionArguments)
penalty function value
vector with labeled parameter values
list with field lambda (tuning parameter value)
list with field regularizedParameterLabels (labels of regularized parameters), and eps (controls the smooth approximation of non-differential penalty functions (e.g., lasso, adaptive lasso, or elastic net). Smaller values result in closer approximation, but may also cause larger issues in optimization.)