positive_free()

template<typename T >

T stan::math::positive_free ( const T &  y )

inline

Return the unconstrained value corresponding to the specified positive-constrained value.

The transform is the inverse of the transform \(f\) applied by positive_constrain(T), namely

\(f^{-1}(x) = \log(x)\).

The input is validated using check_positive().

Parameters

y	Input scalar.

Returns

Unconstrained value that produces the input when constrained.

Template Parameters

T	Type of scalar.

Exceptions

std::domain_error

if the variable is negative

Definition at line 29 of file positive_free.hpp.