File: MatrixBase_colwise_iterator_cxx11.cpp

package info (click to toggle)
eigen3 3.4.0-5
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 20,492 kB
  • sloc: cpp: 151,572; ansic: 75,396; fortran: 24,137; sh: 971; python: 244; javascript: 205; makefile: 42
file content (12 lines) | stat: -rw-r--r-- 471 bytes parent folder | download | duplicates (8) 
1
2
3
4
5
6
7
8
9
10
11
12
 
Matrix3i m = Matrix3i::Random();
cout << "Here is the initial matrix m:" << endl << m << endl;
int i = -1;
for(auto c: m.colwise()) {
  c *= i;
  ++i;
}
cout << "Here is the matrix m after the for-range-loop:" << endl << m << endl;
auto cols = m.colwise();
auto it = std::find_if(cols.cbegin(), cols.cend(),
                       [](Matrix3i::ConstColXpr x) { return x.squaredNorm() == 0; });
cout << "The first empty column is: " << distance(cols.cbegin(),it) << endl;