|
2303
|
1 ### Copyright (C) 1996 John W. Eaton |
|
|
2 ### |
|
|
3 ### This file is part of Octave. |
|
|
4 ### |
|
|
5 ### Octave is free software; you can redistribute it and/or modify it |
|
|
6 ### under the terms of the GNU General Public License as published by |
|
|
7 ### the Free Software Foundation; either version 2, or (at your option) |
|
|
8 ### any later version. |
|
|
9 ### |
|
|
10 ### Octave is distributed in the hope that it will be useful, but |
|
|
11 ### WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
12 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
|
13 ### General Public License for more details. |
|
|
14 ### |
|
|
15 ### You should have received a copy of the GNU General Public License |
|
|
16 ### along with Octave; see the file COPYING. If not, write to the Free |
|
|
17 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
|
|
18 ### 02111-1307, USA. |
|
904
|
19 |
|
2311
|
20 ## usage: polyinteg (p) |
|
|
21 ## |
|
|
22 ## Returns the coefficients of the integral the polynomial whose coefficients |
|
|
23 ## are represented by the vector p. |
|
|
24 ## |
|
|
25 ## The constant of integration is zero. |
|
|
26 ## |
|
|
27 ## SEE ALSO: poly, polyderiv, polyreduce, roots, conv, deconv, residue, |
|
|
28 ## filter, polyval, polyvalm |
|
1025
|
29 |
|
2311
|
30 function p = polyinteg (p) |
|
559
|
31 |
|
2303
|
32 ## Written by Tony Richardson (amr@mpl.ucsd.edu) June 1994. |
|
559
|
33 |
|
|
34 if(nargin != 1) |
|
1025
|
35 usage ("polyinteg (vector)"); |
|
559
|
36 endif |
|
|
37 |
|
1025
|
38 if (is_matrix (p)) |
|
|
39 error ("argument must be a vector"); |
|
559
|
40 endif |
|
|
41 |
|
1025
|
42 lp = length (p); |
|
559
|
43 |
|
1025
|
44 if (lp == 0) |
|
559
|
45 p = []; |
|
|
46 return; |
|
|
47 end |
|
|
48 |
|
1025
|
49 if (rows (p) > 1) |
|
2303
|
50 ## Convert to column vector |
|
559
|
51 p = p.'; |
|
|
52 endif |
|
|
53 |
|
1025
|
54 p = [ p, 0 ] ./ [ lp:-1:1, 1 ]; |
|
559
|
55 |
|
|
56 endfunction |
