ub_constrain() [6/14]

template<typename T , typename U , require_all_stan_scalar_t< T, U > * = nullptr, require_all_not_st_var< T, U > * = nullptr>

auto stan::math::ub_constrain ( const T &  x, const U &  ub, std::decay_t< return_type_t< T, U > > &  lp  )

inline

Return the upper-bounded value for the specified unconstrained scalar and upper bound and increment the specified log probability reference with the log absolute Jacobian determinant of the transform.

Specialization of ub_constrain to apply a matrix of upper bounds elementwise to each input element.

The transform is as specified for ub_constrain(T, double). The log absolute Jacobian determinant is

\( \log | \frac{d}{dx} -\mbox{exp}(x) + U | = \log | -\mbox{exp}(x) + 0 | = x\).

Template Parameters

T	type of scalar
U	type of upper bound
S	type of log probability

Parameters

[in]	x	free scalar
[in]	ub	upper bound
[in,out]	lp	log density

Returns

scalar constrained to have upper bound

Template Parameters

T	A type inheriting from EigenBase.
U	A type inheriting from EigenBase.

Parameters

[in]	x	unconstrained input
[in]	ub	upper bound on output
[in,out]	lp	reference to log probability to increment

Returns

upper-bound constrained value corresponding to inputs

Definition at line 67 of file ub_constrain.hpp.