trace() [3/4]

template<typename T , require_eigen_t< T > * = nullptr, require_not_st_var< T > * = nullptr>

value_type_t< T > stan::math::trace ( const T &  m )

inline

Returns the trace of the specified matrix.

The trace is defined as the sum of the elements on the diagonal. The matrix is not required to be square. Returns 0 if matrix is empty.

Template Parameters

T	type of the elements in the matrix

Parameters

[in]

m

Specified matrix.

Returns

Trace of the matrix.

Definition at line 22 of file trace.hpp.