Mercurial > octave

annotate scripts/strings/dec2bin.m @ 2268:ee5ec3133ed3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
[project @ 1996-05-24 00:53:19 by jwe] Initial revision
author jwe
date Fri, 24 May 1996 00:53:19 +0000
parents
children 6dedd4e0a82f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2268
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
1 # Copyright (C) 1996 John W. Eaton
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
2 #
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
3 # This file is part of Octave.
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
4 #
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
5 # Octave is free software; you can redistribute it and/or modify it
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
6 # under the terms of the GNU General Public License as published by the
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
7 # Free Software Foundation; either version 2, or (at your option) any
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
8 # later version.
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
9 #
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
10 # Octave is distributed in the hope that it will be useful, but WITHOUT
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
13 # for more details.
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
14 #
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
15 # You should have received a copy of the GNU General Public License
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
16 # along with Octave; see the file COPYING. If not, write to the Free
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
17 # Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
18
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
19 function y = dec2bin (x)
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
20
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
21 # usage: dec2bin (x)
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
22 #
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
23 # Returns the binary number corresponding to the nonnegative integer
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
24 # x. For example, dec2bin (14) returns "1110".
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
25
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
26 # Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>.
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
27
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
28 if (nargin != 1)
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
29 usage ("dec2bin (x)");
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
30 endif
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
31
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
32 [nr, nc] = size (x);
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
33
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
34 len = nr * nc;
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
35
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
36 x = reshape (x, 1, len);
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
37
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
38 eleo = empty_list_elements_ok;
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
39 unwind_protect
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
40 empty_list_elements_ok = 1;
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
41 y = [];
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
42 for i = 1:len
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
43 tmp = x (i);
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
44 if (tmp == round (tmp) && tmp >= 0)
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
45 while (tmp >= 2)
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
46 z = fix (tmp ./ 2);
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
47 y = [y, tmp - 2 * z];
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
48 tmp = z;
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
49 endwhile
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
50 y = [y, tmp];
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
51 else
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
52 error ("dec2hex: invalid conversion");
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
53 endif
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
54 endfor
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
55 y = fliplr (y);
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
56 y = setstr (y + toascii ("0"));
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
57 unwind_protect_cleanup
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
58 empty_list_elements_ok = eleo;
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
59 end_unwind_protect
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
60
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
61 endfunction
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
jwe
parents:
diff changeset
62