Ensures a value remains above a small threshold using a smooth approximation and penalty.
See https://github.com/kaskr/adcomp/issues/7 for discussion.
Arguments
- x
A numeric value or vector to constrain.
- eps
A numeric value specifying the minimum allowable value (default 0.001).
Value
A list with components:
- new
Numeric value or vector of transformed values that remain above eps.
- penalty
Numeric value or vector of penalties applied when x < eps.
