C-XSC - A C++ Class Library for Extended Scientific Computing  2.5.4
l_rmatrix.cpp
1 /*
2 ** CXSC is a C++ library for eXtended Scientific Computing (V 2.5.4)
3 **
4 ** Copyright (C) 1990-2000 Institut fuer Angewandte Mathematik,
5 ** Universitaet Karlsruhe, Germany
6 ** (C) 2000-2014 Wiss. Rechnen/Softwaretechnologie
7 ** Universitaet Wuppertal, Germany
8 **
9 ** This library is free software; you can redistribute it and/or
10 ** modify it under the terms of the GNU Library General Public
11 ** License as published by the Free Software Foundation; either
12 ** version 2 of the License, or (at your option) any later version.
13 **
14 ** This library is distributed in the hope that it will be useful,
15 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 ** Library General Public License for more details.
18 **
19 ** You should have received a copy of the GNU Library General Public
20 ** License along with this library; if not, write to the Free
21 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23 
24 /* CVS $Id: l_rmatrix.cpp,v 1.16 2014/01/30 17:23:46 cxsc Exp $ */
25 
26 #define _CXSC_CPP
27 
28 #include "l_rmatrix.hpp"
29 #include "matrix.inl"
30 #include "l_rmatrix.inl"
31 #include "lrvecrmat.inl"
32 
33 namespace cxsc {
34  l_rmatrix Id ( const l_rmatrix& A ) // l_real identity matrix
35  { //-----------------------
36  int i,j;
37  int lbi = Lb(A,1), ubi = Ub(A,1);
38  int lbj = Lb(A,2), ubj = Ub(A,2);
39  l_rmatrix B(lbi,ubi,lbj,ubj);
40 
41  for (i = lbi; i <= ubi; i++)
42  for (j = lbj; j <= ubj; j++)
43  B[i][j] = (i==j) ? 1.0 : 0.0;
44  return B;
45  }
46 
47  l_rmatrix transp ( const l_rmatrix& A ) // Transposed matrix
48  { //------------------
49  int n;
50  l_rmatrix res(Lb(A,2),Ub(A,2),Lb(A,1),Ub(A,1));
51 
52  for (n = Lb(A,1); n <= Ub(A,1); n++) Col(res,n) = Row(A,n);
53  return res;
54  }
55 
56  void DoubleSize ( l_rmatrix& A )
57  {
58  int n = Lb(A,1);
59  Resize(A,n,2*Ub(A,1)-n+1,Lb(A,2),Ub(A,2));
60  }
61 
62 } // namespace cxsc
63 
The Multiple-Precision Data Type l_rmatrix.
Definition: l_rmatrix.hpp:416
The namespace cxsc, providing all functionality of the class library C-XSC.
Definition: cdot.cpp:29
cimatrix_subv Col(cimatrix &m, const int &i) noexcept
Returns one column of the matrix as a vector.
Definition: cimatrix.inl:242
cimatrix transp(const cimatrix &A)
Returns the transposed matrix.
Definition: cimatrix.cpp:74
cimatrix_subv Row(cimatrix &m, const int &i) noexcept
Returns one row of the matrix as a vector.
Definition: cimatrix.inl:231
int Ub(const cimatrix &rm, const int &i) noexcept
Returns the upper bound index.
Definition: cimatrix.inl:1163
void DoubleSize(cimatrix &A)
Doubles the size of the matrix.
Definition: cimatrix.cpp:83
cimatrix Id(const cimatrix &A)
Returns the Identity matrix.
Definition: cimatrix.cpp:61
void Resize(cimatrix &A) noexcept
Resizes the matrix.
Definition: cimatrix.inl:1211
int Lb(const cimatrix &rm, const int &i) noexcept
Returns the lower bound index.
Definition: cimatrix.inl:1156