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

Armadillo Library

+// Copyright (C) 2009-2011 NICTA (www.nicta.com.au)
+// Copyright (C) 2009-2011 Conrad Sanderson
+// Copyright (C) 2009-2010 Dimitrios Bouzas
+// 
+// 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 op_repmat
+//! @{
+
+
+
+//! \brief
+//! implementation of the 'repeat matrix' operation, used for constructing matrices
+template<typename T1>
+inline
+void
+op_repmat::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_repmat>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const unwrap_check<T1> tmp(in.m, out);
+  const Mat<eT>& X     = tmp.M;
+  
+  const uword copies_per_row = in.aux_uword_a;
+  const uword copies_per_col = in.aux_uword_b;
+  
+  const uword X_n_rows = X.n_rows;
+  const uword X_n_cols = X.n_cols;
+  
+  out.set_size(X_n_rows * copies_per_row, X_n_cols * copies_per_col);
+  
+  const uword out_n_rows = out.n_rows;
+  const uword out_n_cols = out.n_cols;
+  
+  if( (out_n_rows > 0) && (out_n_cols > 0) )
+    {
+    for(uword col = 0; col < out_n_cols; col += X_n_cols)
+      {
+      for(uword row = 0; row < out_n_rows; row += X_n_rows)
+        {
+        out.submat(row, col, row+X_n_rows-1, col+X_n_cols-1) = X;
+        }
+      }
+    }
+  }
+
+
+
+//! @}