std::istream operator>> should be added
Submitted by Helmut Jarausch
Assigned to Nobody
Link to original bugzilla bug (#622)
Description
There should be an input operator>> which can read files written with the
built-in output operator<<
The following addition to Eigen/src/Core/IO.h would be quite helpful
+template<typename Derived>
+std::istream & operator >>
+(std::istream & s,
- MatrixBase<Derived> & m)
+{ - for (int i = 0; i < m.rows(); ++i)
- for (int j = 0; j < m.cols(); j++)
-
s >> m(i,j);
- return s;
+}
} // end namespace Eigen
IMHO there is no need for a fancy input operator (using non-white-space separators, e.g.) since the standard output operator doesn't create such files.
In teaching C++ using Eigen, it's so much easier to tell the students that
a matrix/vector written with operator<< can be read in by this new operator>>
Thanks for considering this tiny addition,
Helmut Jarausch
Lehrst. f. Numerische Mathematik
RWTH-Aachen, Germany
Blocking
Edited by Eigen Bugzilla