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

Armadillo Library

+// Copyright (C) 2009-2011 NICTA (www.nicta.com.au)
+// Copyright (C) 2009-2011 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 glue_solve
+//! @{
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_solve::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_solve>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  Mat<eT> A = X.A.get_ref();
+  
+  const unwrap_check<T2> B_tmp(X.B, out);
+  const Mat<eT>& B = B_tmp.M;
+  
+  arma_debug_check( (A.n_rows != B.n_rows), "solve(): number of rows in A and B must be the same" );
+  
+  bool status;
+  
+  if(A.n_rows == A.n_cols)
+    {
+    const uword mode = X.aux_uword;
+    
+    status = (mode == 0) ? auxlib::solve(out, A, B) : auxlib::solve(out, A, B, true);
+    }
+  else
+  if(A.n_rows > A.n_cols)
+    {
+    arma_extra_debug_print("solve(): detected over-determined system");
+    status = auxlib::solve_od(out, A, B);
+    }
+  else
+    {
+    arma_extra_debug_print("solve(): detected under-determined system");
+    status = auxlib::solve_ud(out, A, B);
+    }
+  
+  if(status == false)
+    {
+    out.reset();
+    arma_bad("solve(): solution not found");
+    }
+  }
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_solve_tr::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_solve_tr>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const unwrap_check<T1> A_tmp(X.A, out);
+  const unwrap_check<T2> B_tmp(X.B, out);
+  
+  const Mat<eT>& A = A_tmp.M;
+  const Mat<eT>& B = B_tmp.M;
+  
+  bool  err_state = false;
+  char* err_msg   = 0;
+  
+  arma_debug_set_error( err_state, err_msg, ((&A) == (&B)),           "solve(): A is an alias of B" );
+  arma_debug_set_error( err_state, err_msg, (A.n_rows != B.n_rows),   "solve(): number of rows in A and B must be the same" );
+  arma_debug_set_error( err_state, err_msg, (A.is_square() == false), "solve(): A is not a square matrix" );
+  
+  arma_debug_check(err_state, err_msg);
+  
+  const bool status = auxlib::solve_tr(out, A, B, X.aux_uword);
+  
+  if(status == false)
+    {
+    out.reset();
+    arma_bad("solve(): solution not found");
+    }
+  }
+
+
+
+//! @}