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Support retrieving geom::matrix row or column as a vector

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This commit is contained in:
Nikita Lisitsa 2022-06-17 18:51:39 +03:00
parent 6d0a8cec55
commit b77060abac
1 changed files with 18 additions and 0 deletions
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18
libs/geom/include/psemek/geom/matrix.hpp
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@ -288,6 +288,24 @@ namespace psemek::geom
return result; return result;
} }
template <typename T, std::size_t R, std::size_t C>
vector<T, C> row(matrix<T, R, C> const & m, std::size_t i)
{
vector<T, C> r;
for (std::size_t j = 0; j < C; ++j)
r[j] = m[i][j];
return r;
}
template <typename T, std::size_t R, std::size_t C>
vector<T, R> column(matrix<T, R, C> const & m, std::size_t j)
{
vector<T, R> r;
for (std::size_t i = 0; i < R; ++i)
r[i] = m[i][j];
return r;
}
template <typename T, std::size_t R, std::size_t C> template <typename T, std::size_t R, std::size_t C>
T frobenius_norm_sqr(matrix<T, R, C> const & m) T frobenius_norm_sqr(matrix<T, R, C> const & m)
{ {