13 lines
471 B
C++
13 lines
471 B
C++
|
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;
|