solve_powell()

template<typename F , typename T , typename... T_Args, require_eigen_vector_t< T > * = nullptr>

Eigen::Matrix< stan::return_type_t< T_Args... >, Eigen::Dynamic, 1 > stan::math::solve_powell	(	const F &	f,
		const T &	x,
		std::ostream *const	msgs,
		const T_Args &...	args
	)

Return the solution to the specified system of algebraic equations given an initial guess, and parameters and data, which get passed into the algebraic system.

Use Powell's dogleg solver.

This signature does not let the user specify the tuning parameters of the solver (instead default values are used).

Template Parameters

F	type of equation system function
T	type of elements in the x vector
Args	types of additional input to the equation system functor

Parameters

[in]	f	Functor that evaluates the system of equations.
[in]	x	Vector of starting values (initial guess).
[in,out]	msgs	the print stream for warning messages.
[in]	args	Additional parameters to the equation system functor.

Returns

theta Vector of solutions to the system of equations.

Exceptions

<code>std::invalid_argument</code>	if x has size zero.
<code>std::invalid_argument</code>	if x has non-finite elements.
<code>std::invalid_argument</code>	if relative_tolerance is strictly negative.
<code>std::invalid_argument</code>	if function_tolerance is strictly negative.
<code>std::invalid_argument</code>	if max_num_steps is not positive.
<code>std::domain_error</code>	solver exceeds max_num_steps.
<code>std::domain_error</code>	if the norm of the solution exceeds the function tolerance.

Definition at line 188 of file solve_powell.hpp.