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/* Copyright (c) 2008-2022 the MRtrix3 contributors.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Covered Software is provided under this License on an "as is"
* basis, without warranty of any kind, either expressed, implied, or
* statutory, including, without limitation, warranties that the
* Covered Software is free of defects, merchantable, fit for a
* particular purpose or non-infringing.
* See the Mozilla Public License v. 2.0 for more details.
*
* For more details, see http://www.mrtrix.org/.
*/
#ifndef __math_condition_number_h__
#define __math_condition_number_h__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#include <Eigen/SVD>
#pragma GCC diagnostic pop
namespace MR
{
namespace Math
{
template <class M>
inline default_type condition_number (const M& data)
{
assert (data.rows() && data.cols());
auto v = Eigen::JacobiSVD<M> (data).singularValues();
return v[0] / v[v.size()-1];
}
}
}
#endif
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