tutoQrUpdate.cpp File Reference

#include <STKpp.h>

Include dependency graph for tutoQrUpdate.cpp:

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Functions
int	main (int argc, char **argv)

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 4 of file tutoQrUpdate.cpp.

{
  ArrayXX a(5,4), QR;
  a << 0, 1, 2, 3,
       2, 3, 4, 5,
       2, 1, 6, 7,
       0, 3,-1, 2,
       3,-1, 1, 1;
  stk_cout << "lapack QR decomposition:\n";
  lapack::Qr lq(a); lq.run();
  // remove column
  lq.eraseCol(2);
  stk_cout << "R matrix:\n";
  stk_cout << lq.R();
  QR = lq.Q() * lq.R();
  stk_cout << "QR matrix:\n";
  stk_cout << QR;
  // insert constant column with value 1 in column 2
  lq.insertCol(Const::Vector<Real>(5), 2);
  stk_cout << "\nR matrix:\n";
  stk_cout << lq.R();
  QR = lq.Q() * lq.R();
  stk_cout << "QR matrix:\n";
  stk_cout << QR;
  return 0;
}

References STK::IQr< Derived >::eraseCol(), STK::IQr< Derived >::insertCol(), STK::IQr< Derived >::Q(), STK::IQr< Derived >::R(), STK::IQr< Derived >::run(), and stk_cout.