LORENE
coeffjaco.C
1 /*
2  * Copyright (c) 2007 Jean-Louis Cornou
3  *
4  * This file is part of LORENE.
5  *
6  * LORENE is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * LORENE is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with LORENE; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
22 /*
23  * $Id: coeffjaco.C,v 1.3 2014/10/13 08:53:12 j_novak Exp $
24  * $Log: coeffjaco.C,v $
25  * Revision 1.3 2014/10/13 08:53:12 j_novak
26  * Lorene classes and functions now belong to the namespace Lorene.
27  *
28  * Revision 1.2 2007/12/21 12:41:46 j_novak
29  * Removed the #include<fftw3.h> not needed here. Corrected headers.
30  *
31  * Revision 1.1 2007/12/11 15:42:21 jl_cornou
32  * Premiere version des fonctions liees aux polynomes de Jacobi(0,2)
33  *
34  * $Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/coeffjaco.C,v 1.3 2014/10/13 08:53:12 j_novak Exp $
35  *
36  */
37 
38 #include "tbl.h"
39 
40 namespace Lorene {
41 Tbl jacobipointsgl(int) ;
42 
43 double* coeffjaco(int n , double* ff) {
44 
45  Tbl jj = jacobipointsgl(n) ;
46  double som ;
47  int i,k ;
48  double* aa = new double[n+1] ;
49 
50  for (k = 0 ; k < n ; k++) {
51  som = 3*ff[0]*jj(k,0)/(jj(n,0)*jj(n,0)) ;
52  for (i = 1 ; i < n+1 ; i++) {
53  som += ff[i]*jj(k,i)/(jj(n,i)*jj(n,i)) ;
54  }
55  aa[k] = (2*k+3)/double(n*(n+3))*som ;
56  }
57  som = 3*ff[0]/jj(n,0) ;
58  for (i = 1 ; i < n+1 ; i++) {
59  som += ff[i]/jj(n,i) ;
60  }
61  aa[n]=som/double(n+3) ;
62  return aa ;
63 }
64 }
Lorene prototypes.
Definition: app_hor.h:67