comparison armadillo-2.4.4/include/armadillo_bits/fn_qr.hpp @ 0:8b6102e2a9b0

Armadillo Library

+// Copyright (C) 2009-2012 NICTA (www.nicta.com.au)
+// Copyright (C) 2009-2012 Conrad Sanderson
+// 
+// This file is part of the Armadillo C++ library.
+// It is provided without any warranty of fitness
+// for any purpose. You can redistribute this file
+// and/or modify it under the terms of the GNU
+// Lesser General Public License (LGPL) as published
+// by the Free Software Foundation, either version 3
+// of the License or (at your option) any later version.
+// (see http://www.opensource.org/licenses for more info)
+
+
+//! \addtogroup fn_qr
+//! @{
+
+
+
+//! QR decomposition
+template<typename T1>
+inline
+bool
+qr
+  (
+         Mat<typename T1::elem_type>&    Q,
+         Mat<typename T1::elem_type>&    R,
+  const Base<typename T1::elem_type,T1>& X,
+  const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  arma_debug_check( (&Q == &R), "qr(): Q and R are the same object");
+  
+  const bool status = auxlib::qr(Q, R, X);
+  
+  if(status == false)
+    {
+    Q.reset();
+    R.reset();
+    arma_bad("qr(): failed to converge", false);
+    }
+  
+  return status;
+  }
+
+
+
+//! @}