C-XSC - A C++ Class Library for Extended Scientific Computing  2.5.4
intmatrix.cpp
00001 /*
00002 **  CXSC is a C++ library for eXtended Scientific Computing (V 2.5.4)
00003 **
00004 **  Copyright (C) 1990-2000 Institut fuer Angewandte Mathematik,
00005 **                          Universitaet Karlsruhe, Germany
00006 **            (C) 2000-2014 Wiss. Rechnen/Softwaretechnologie
00007 **                          Universitaet Wuppertal, Germany   
00008 **
00009 **  This library is free software; you can redistribute it and/or
00010 **  modify it under the terms of the GNU Library General Public
00011 **  License as published by the Free Software Foundation; either
00012 **  version 2 of the License, or (at your option) any later version.
00013 **
00014 **  This library is distributed in the hope that it will be useful,
00015 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 **  Library General Public License for more details.
00018 **
00019 **  You should have received a copy of the GNU Library General Public
00020 **  License along with this library; if not, write to the Free
00021 **  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 */
00023 
00024 /* CVS $Id: intmatrix.cpp,v 1.16 2014/01/30 17:23:45 cxsc Exp $ */
00025 
00026 #define _CXSC_CPP
00027 
00028 #include "intmatrix.hpp"
00029 #include "matrix.inl"
00030 #include "intmatrix.inl"
00031 
00032 namespace cxsc {
00033       intmatrix Id ( const intmatrix& A )             // Identity matrix
00034       {                                               //----------------
00035         int i,j;
00036         int lbi = Lb(A,1), ubi = Ub(A,1);
00037         int lbj = Lb(A,2), ubj = Ub(A,2);
00038         intmatrix B(lbi,ubi,lbj,ubj);
00039       
00040         for (i = lbi; i <= ubi; i++)
00041           for (j = lbj; j <= ubj; j++)
00042             B[i][j] = (i==j) ? 1 : 0;
00043         return B;
00044       }
00045       
00046       intmatrix transp ( const intmatrix& A )         // Transposed matrix
00047       {                                               //------------------
00048         int      n;
00049         intmatrix  res(Lb(A,2),Ub(A,2),Lb(A,1),Ub(A,1));
00050       
00051         for (n = Lb(A,1); n <= Ub(A,1); n++) Col(res,n) = Row(A,n);
00052         return res;
00053       }
00054 
00055       void DoubleSize ( intmatrix& A )
00056       {
00057         int n = Lb(A,1);
00058         Resize(A,n,2*Ub(A,1)-n+1,Lb(A,2),Ub(A,2));
00059       }
00060 
00061 } // namespace cxsc
00062