unit_vector_constrain() [8/11]

template<typename T1 , typename T2 , require_eigen_col_vector_t< T1 > * = nullptr, require_all_not_vt_autodiff< T1, T2 > * = nullptr>

plain_type_t< T1 > stan::math::unit_vector_constrain ( const T1 &  y, T2 &  lp  )

inline

Return the unit length vector corresponding to the free vector y.

See https://en.wikipedia.org/wiki/N-sphere#Generating_random_points

Template Parameters

T1	type inheriting from EigenBase that does not have an fvar scalar type.

Parameters

y	vector of K unrestricted variables

Returns

Unit length vector of dimension K

Parameters

lp	Log probability reference to increment.

Definition at line 49 of file unit_vector_constrain.hpp.