simplex_constrain() [6/6]

template<typename T , require_rev_col_vector_t< T > * = nullptr>

auto stan::math::simplex_constrain ( const T &  y, scalar_type_t< T > &  lp  )

inline

Return the simplex corresponding to the specified free vector and increment the specified log probability reference with the log absolute Jacobian determinant of the transform.

The simplex transform is defined using the inverse of the isometric log ratio (ILR) transform. This is equivalent to softmax(sum_to_zero_constrain(y)).

Template Parameters

T	type of the vector to constrain

Parameters

y	Free vector input of dimensionality N.
lp	Log probability reference to increment.

Returns

Simplex of dimensionality N + 1.

Definition at line 71 of file simplex_constrain.hpp.